After Phil's answer, I just had to give another. Ask a teacher. :) FInd one who you think will give you a straight answer rathere th]an just "Use me more. Pay me more". I suspect you'll find some here. . As Phil says, the answer must suit you for now.

There is no one best way that works for all students at all times. General advice is cheap — it’s enough to copy and paste the question into the search engine of your choice. But to really find out the best course of action in your particular case, at this particular point in your learning journey, we’d have to gather relevant data, apply expert analysis, and make choices — only then would we really know what to do for maximum efficiency and effectiveness. Sorry if this doesn’t seem to answer your question, but any other answer would just be nonsense.

You need to input the language instead of memorizing it. So, what you could do is you could watch many English movies with subtitles in English. Make sure that these movies are interesting to you so that you don't get bored or bothered while watching. After you've watched a few movies, you could start reading books because by then you would probably have enough vocabulary in your brain to be recalled instaneously.

I am also struggling with this for Vietnamese and Thai. What you can do immediately is talk, talk, and talk some more. Also make sure to continually study grammar and try to use the grammar that you studied. Otherwise you may end up stuck in intermediate level forever. After you reach a level where you can understand spoken English somewhat easily, you can probably polish you English by watching movies and TV shows in English. You need to watch lots of it. Also beware of watching YouTube in English. Not everybody is well spoken and you don't want to pick up the bad habits of those who are less well spoken. Good luck!

Reading, watching movies, and talk with native people.