I know of no Christian church that would prevent an Asian person from coming in, just because they were Asian. What country do you live in?
Anyway, you asked how to become a Christian. That is an operation of the Holy Spirit upon an individual. It can happen in church, or outside of a church building. Location has nothing to do with it. First, a repentant sinner has to be justified by God - a legal repositioning of the former sinner to a standing of acceptance into the family of God once he is born from above by the Holy Spirit (see John chapter 3).
Justification has to happen first, otherwise there will be no on-going process of, and final receiving of salvation, which culminates in the redemption of our bodies – when we receive a glorified body just like Jesus’ glorified body that was redeemed from the grave. It is a legal standing that is conferred on a repentant sinner who places all their faith in Jesus. It happens in a moment of time, at the point of being born from above by the Holy Spirit. God pardons the sins of that person due to what Jesus accomplished on their behalf. That person is then sanctified, which means ‘set apart for holy use’. Their whole life is then a process of becoming more and more sanctified as they learn to live for God and no longer for self.
“I appeal to you therefore, brothers, by the mercies of God, to present your bodies as a living sacrifice, holy and acceptable to God, which is your spiritual worship. Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect. “ Romans 12:1-2
Righteousness; Romans 1:17 - "For in the gospel a righteousness from God is revealed, a righteousness that is by FAITH FROM FIRST TO LAST [not works] just as it is written, 'The righteous will live by FAITH'."
Romans 3:20 - "Therefore no-one will be declared righteous in God's sight by observing the law; rather, through the law ewe become conscious of sin. But now a righteousness from God, apart from law, has been made known, to which the Law and the Prophets testify. This righteousness from God comes through faith in Jesus Christ to all who believe. There is no difference, for all have sinned and fall short of the glory of God, and are justified freely by his grace through the redemption that came by Jesus Christ... For we maintain that a man is justified by faith apart fro observing the law...To the man who trusts God who justifies the wicked, his faith is credited as righteousness." (4:4)
They ‘receive’ sanctification when Jesus returns in glory and their bodies are redeemed from corruption by being incorruptible bodies. Just as Jesus Christ was raised from the dead by the power of God the father, so also every believer in Christ is left with the promise of being raised from the dead some day into an incorruptible, indestructible, immortal glorified resurrection body like the body of the Lord Jesus Christ.
Only if you become a Christian by the power of the Holy Spirit will you go on to experience what transformations occur to you thereafter.
The first step would be to have a personal and systematic study of the Bible with a qualified teacher. We can see the precedent set at Acts 8:26-31 with the Ethiopian eunuch as well as the actions of the first century Christians who didn’t simply take the Apostles Pauls word on matters of the Scriptures but they examined them to make sure the words were true → Acts 17:10, 11: “Immediately by night the brothers sent both Paul and Silas to Be•roe′a. On arriving, they went into the synagogue of the Jews. 11 Now these were more noble-minded than those in Thes•sa•lo•ni′ca, for they accepted the word with the greatest eagerness of mind, carefully examining the Scriptures daily to see whether these things were so.” You’ll need to know what are the requirements of God in order to become a Christian and to do His will, John 15:14 & 1 John 5:3-5.
What It Means to Be a Christian. Jesus extended the invitation to be his follower, saying: “If anyone wants to come after me, let him disown himself and pick up his torture stake and continually follow me.” (Mt 16:24) Those who are true Christians have full faith that Jesus Christ is God’s specially Anointed One and only-begotten Son, the Promised Seed who sacrificed his human life as a ransom, was resurrected and exalted to the right hand of Jehovah, and received authority to subdue his enemies and vindicate Jehovah’s sovereignty. (Mt 20:28; Lu 24:46; Joh 3:16; Ga 3:16; Php 2:9-11; Heb 10:12, 13) Christians view the Bible as the inspired Word of God, absolute truth, beneficial for teaching and disciplining mankind.—Joh 17:17; 2Ti 3:16; 2Pe 1:21.
More is required of true Christians than a mere confession of faith. It is necessary that belief be demonstrated by works. (Ro 10:10; Jas 2:17, 26) Born as sinners, those who become Christians repent, turn around, dedicate their lives to Jehovah, to worship and serve him, and then submit to water baptism. (Mt 28:19; Ac 2:38; 3:19) They must keep themselves clean from fornication, from idolatry, and from eating blood. (Ac 15:20, 29) They strip off old personalities with their fits of anger, obscene talk, lying, stealing, drunkenness, and “things like these,” and they bring their lives into accord with Bible principles. (Ga 5:19-21; 1Co 6:9-11; Eph 4:17-24; Col 3:5-10) “Let none of you,” wrote Peter to Christians, “suffer as a murderer or a thief or an evildoer or as a busybody in other people’s matters.” (1Pe 4:15) Christians are to be kind and considerate, mild-tempered and long-suffering, lovingly exercising self-control. (Ga 5:22, 23; Col 3:12-14) They provide and care for their own and love their neighbors as themselves. (1Ti 5:8; Ga 6:10; Mt 22:36-40; Ro 13:8-10) The main identifying quality by which true Christians are recognized is the outstanding love they have toward one another. “By this,” Jesus said, “all will know that you are my disciples, if you have love among yourselves.”—Joh 13:34, 35; 15:12, 13.
True Christians imitate Jesus’ example as the Great Teacher and Faithful Witness of Jehovah. (Joh 18:37; Re 1:5; 3:14) “Go . . . make disciples of people of all the nations” is their Leader’s command. (Mt 28:19, 20) In carrying it out, Christians ‘witness publicly and from house to house,’ urging people everywhere to flee out of Babylon the Great and put their hope and confidence in God’s Kingdom. (Ac 5:42; 20:20, 21; Re 18:2-4) This is really good news, but proclaiming such a message brings upon Christians great persecution and suffering, even as was experienced by Jesus Christ. His followers are not above him; it is enough if they are like him. (Mt 10:24, 25; 16:21; 24:9; Joh 15:20; 2Ti 3:12; 1Pe 2:21) If one “suffers as a Christian, let him not feel shame, but let him keep on glorifying God in this name,” counseled Peter. (1Pe 4:16) Christians render to “Caesar” what belongs to the superior authorities of this world—honor, respect, tax—but at the same time they remain separate from this world’s affairs (Mt 22:21; Joh 17:16; Ro 13:1-7), and for this the world hates them.—Joh 15:19; 18:36; 1Pe 4:3, 4; Jas 4:4; 1Jo 2:15-17.
It is understandable why people with such high principles of morality and integrity, accompanied by an electrifying message delivered with fiery zeal and outspokenness, quickly gained attention in the first century. Paul’s missionary travels, for example, were like a spreading prairie fire that set city after city ablaze—Antioch in Pisidia, Iconium, Lystra, Derbe, and Perga on one trip; Philippi, Thessalonica, Beroea, Athens, and Corinth on another—causing people to stop, think, and take their stand, either accepting or rejecting the good news of God’s Kingdom. (Ac 13:14–14:26; 16:11–18:17) Many thousands abandoned their false religious organizations, wholeheartedly embraced Christianity, and zealously took up the preaching activity in imitation of Christ Jesus and the apostles. This, in turn, made them objects of hatred and persecution, which was instigated chiefly by the false religious leaders and misinformed political rulers. Their leader Jesus Christ, the Prince of Peace, had been put to death on the charge of sedition; now peace-loving Christians were accused of “disturbing our city,” ‘overturning the inhabited earth,’ and being a people ‘that everywhere is spoken against.’ (Ac 16:20; 17:6; 28:22) By the time Peter wrote his first letter (c. 62-64 C.E.) it seems that the activity of Christians was well known in places such as “Pontus, Galatia, Cappadocia, Asia, and Bithynia.”—1Pe 1:1.
I hope this helps.