I do lots of different things
I read some news articles in Japanese, I listen to my favourite vtuber, I write kanjis by hand, I attend Japanese classes in university, I bought private lessons to speak with a native, I use WaniKani for SRS when I'm pissing, I play video games in Japanese. And other things too

Doing only a single thing is very bad! For me anyways. I get burnt out easily doing the same things over and over, it gets very boring, it makes me lose track of why I want to learn Japanese, and it doesn't work that well anyway...

The textbooks my university use are Minna no Nihongo, Kanji Master, and probably some other things. Don't really like them, but they do the job combined with everything else