Here's what I think. 1. First assess yourself. Can you hear and pronounce all the different English sounds comfortably, like bit vs beat, word vs world, all the different "a", "o" and other vowel sounds? If not, better invest some time (and money if necessary) to master them thoroughly. It is the foundation for listening and speaking, so get to the bottom of it no matter what it takes. 2. After the phonetics are covered, then it is just a matter of studying and practicing. Try to get into the habit of studying on your own with diligence and discipline. Ultimately no one can teach you other than yourself. Practice listening and conversing with friends and what not. Also don't neglect reading. Reading good books and online texts is absolutely the most important thing in language learning, because you'll never be good at anything without acquiring big enough vocabulary, and there is no better way to expand your vocabulary than reading broadly.

I would advise talking to as many people as you can in English. My mentor advises us to Skype with people who are fluent in the language, and use them as a living textbook! Also, something I find helpful, is that I ask the person at the end of the call [you can do it during too :) ] what or how could I improve (e.g. pronunciation/accent, grammar, vocabulary, correct word usage). Hopes this helps!