That's great to hear you are considering joining the Catholic Church. There are many Lutherans who have seen the truth and joined the church. You might find the below video helpful, it is about a man who left being a Lutheran minister to join the Catholic Church. Here is a brief overview:
Peter was born and raised in a Brethren family in Australia. As a child he was called to memorize 200 Bible verses in a year. He and his family sought to follow God’s will and to do it. As a teen he began to read Church history and theology seeking a greater depth in his faith. In college, he met some Lutheran who led him to a deeper understanding of Christianity with such doctrines as baptismal regeneration and the Lutheran understanding of the Real Presence of Christ in the Eucharist. Later, in a Lutheran seminary, he discovered the early Church Fathers and came to realize that the early Church was Catholic. In his attempt to prove that Lutheranism was Catholic, Peter came to realize that the only way he could be truly Catholic was to be in full-communion with the successor of St. Peter in Rome.
https://www.youtube.com/watch?v=5IttF2YjIIg