To learn English, you need to do it as you learnt your first language. This is called Natural way of acquiring language. Listen to poems, English audio books, bbc radio, or you may even watch bbc for kids (think it is called Ceebies or something). Move to speaking, practice those words in your speech so they become part of you and syntax is imprinted on your mind. Also for reading and writing, just pick up your favorite author and write what he has written. That way, the author's words and sentence structure wi become part of your writing.

Focus on building vocabulary and how those words are used in a sentence. You don't have to learn strict grammatical rules, you don't even know the rules of uou first lang but you can communicate in it. Also language changes so no need to be too harsh on rules. Also learn basic things required fir competitive exams like idioms, pair of words etc. The above tips might not apply to you, because I don't know your level of English.