Well; First start from local community college, they may put you in ESL and other classes but do not hesitate to do that because no matter what you take will teach you the basic and definitely helps to move on.

They may give you test and see your level of understanding the subject and will put you on appropriate class. Most community college they try to put you on ESL because you are from other country and not only one but it may go series  or english courses which may be frustrating  to you.

You can go to vocational high school and they may have adult classes and ESL class too. Check this too.