Just my preference, but I focus on watching content on YouTube and conversational practice with native speakers. I also use DeepL translator a lot as a guide for vocabulary and for noticing grammar. YouTube is great because you can watch vloggers who speak very naturally/informally, lectures, or whatever interests you. Forcing yourself to not use subtitles is also good for listening practice, but subtitles are great too. Good luck!

If you want i can send you some books (pdf).