4 Answers

Watch news broadcasters. Usually they speak proper English at a reasonable rate of speed. For slang and curse words, hopefully you have a shopping mall close by and you can go for a stroll there everyday.

Watch a lot of varied American TV and movies...............

Get a book of words and phrases and common courtesy in English, and has the translation of such into your language. That will give  you the basics. Or get a audio tape that teaches English. Or get a computer program with pictures of objects with English subtitles and translation into your language.

I would like to learn Russian, Chinese, French and many others also.  The problem remains the same, I wasn't born there and learned it from birth. Translations and learning Russian from English translations is not natural and offensive. Language is best learned from your mother's lap. Since I am well past learning by that process I think I could pick it up by being around children who are learning their language in just that way. I managed to learn a few words in French while watching a child learning French at home. But I'm certainly not well versed from the little movie I saw.