plz! help me to check grammar!

Social work is an expertise of assisting people and its focus consists of human and the environmental interaction. The objective is to help people, family, groups, and the community to adapt to social circumstances. It is also to prevent and solve social problems to keep the Commonwealth.
May I state the reason why do I want to study social work and choose this school?
I want to study social work because I hope to help some people like me. I had hot temper and low EQ previously. I want to help some family to settle their troubles.

There are two colleges which offer these courses in this city which are xxx and yyy respectively. I chose yyy because it is approved internationally.

改了很多，希望幫到你。

Social work is a professional curriculum of assisting people and the focus mainly consists of the interacation between people and the environment. The mission of a social worker is to help the community to adapt the changing social circumstances through assistance and comfort, keeping the well-being of the community.

May I introduce the reason why I want to study social work at this institute? In the past I was a hot-tempered person with low EQ. I want help people like me, so I want to study social work. I also want to help families settle different problems.

There are only 2 colleges offering this course in the city and I will choose yyy because of yyy's reputation and the policy of adopting English as the official teaching language.

( ) = 改左既野

Social work is a specialty about (assisting) people and the focus is consists in human and the environment interaction. The objective is (to) help people, family, groups and the community to adapt social circumstances, () prevent and comfort social (issues), (and) keep (their commonwealth).
Should I (tell) the reason (why) I want to study social work and choose this school?
I want to study social work, because I hope to help (other) people like me(.) I once had hot temper and low EQ. I want to help (other families to overcome their problems).
In this city, only () 2 college(s) have this (course), xxx & yyy, I choose yyy because yyy is approved by international and (use) English to give lesson.