It's hard for you to determine by yourself and from your own study what your key pronunciation issues are. You may have a few big ones which you should focus on and maybe some other little ones which can wait. I recommend you have a session with a teacher. You could even book a cheap trial session and be open that you may not be able to buy further lessons. Even a 30 minute chat will be enough for you to get some focused tips which you can then work on, in your own time.

You can read books al lot. And reading it a loud. Recording yourself could help too for you to recognize in what pronunciation you're having a hard timr with. By the way I'm also an English learner

The lyrics are very useful. You can listen to a song...and while listening to it in English, you can write with a pencil on individual words, the pronunciation. And then listen again to the song verses, repeating the pronunciation.