How do you learn to be good at English?

Answer 1

Practice. Also, are you talking about the language or the subject?

If the subject, then try analysing pieces of text and doing comprehension questions which you can probably find on the internet.

If the language, then i find listening/speaking to the language until i fall asleep. then, normally i will remember it in the morning. Or buy how to learn English books, and try to speak the language at home.