How to study English?

You have to do it continuously. And you have to use English everyday in order to learn it. By use, I mean reading English, listening to English, speaking English, writing English, thinking in English etc.

And please use a dictionary to learn new words and the internet to learn their usage. Collocations – words that go together – are an important aspect of English that you must learn if you want to sound natural like a native speaker.

I can’t give any more advice, except the following: just start.