I think you should try having English lessons to improve your level. I'm a qualified teacher & native English speaker from London, I charge £10 p/hr if you're interested? you need to really surround yourself with English, music/movies/tv/other speakers. your post is understandable but there are some basic grammatical errors

Yes, I believe the only real way to make that next step in your language learning is to speak with and learn from native speakers and surround yourself with English. Although you can teach yourself a lot, a teacher would make a big difference. I would suggest learning vocabulary by yourself because it's just memorizing, and then when you spend time with a teacher you can learn how to use those words in context, (and fix any pronunciation errors) and you can learn grammar. The things that are more complicated than just memorizing words will be easiest to learn from a real teacher. Don't give up on English! I think being bilingual is just about the coolest thing in the world, and aside from being cool, it's really helpful and productive. It is as life long skill good for travel and work. I think when you're learning a language, you can get to a certain point where you know a good amount of vocabulary and some grammar, but you just can't make sentences. There's a certain time when you just get stuck and it feels like fluency in that language is impossible. That's how I feel about German right now. But let me tell you, it is not impossible to overcome. Just look at all the people in the world who learning a language and can now speak it fluently. Get a teacher and don't give up!

I suggest voice chat. Try to make some friends who are native speakers on wechat, skype, or even websites like this.