What is your goal with English? What is the reason you are learning it and what do you want to do with it? That will help you decide how and what to learn. If you need English for your work that means you should focus your studying slightly differently than if you want to visit New York City as a tourist.
How do you like to learn? What is convenient for you? Do you have time to listen to the radio or podcasts in English or to watch videos, TV series, or movies? Do you think using a textbook is something you would like?