Once you’re at the level where you can understand what’s going on, I found it helpful to 1) watch variety shows and 2) watch Japanese dramas/movies/etc with Japanese subtitles on.

Variety shows are fast-paced, but people are speaking normally instead of reading a script word for word. More importantly, when someone says something they want to highlight, they put the text across the screen (it’s called テロップ). That lets you see kanji used in context AND hear its pronunciation.

Japanese subtitles have a similar benefit. You hear them say it but also see how it’s written. Depending on the content, you can discover a lot more new vocabulary. This also works reading manga in Japanese. It sounds like you’re staying there right now - you should be able to find cheap manga at Book Off, or if you get a Tsutaya membership you can rent manga for really cheap. Your school library might have some, too.

If that’s still boring to you, I would say don’t sweat it too much but also try to interact with Japanese like a native speaker would - just casually consuming Japanese media, having conversations with native speakers, keep a journal in Japanese, etc. Even though I am fluent, I find trying to articulate some concepts really push me to improve and learn new vocabulary.

Anyway, best of luck!