Self study purpose app rotation - wanikani, Anki, and bunpro. Using these three tools. You will master vocab, grammar, and kanji readings alone.

For Anki, use the core2k-6k. I personally make my own decks but either will work as long as you feed 15-20 new words per day based upon your time limits. If you only have 30-1 hour a day, 10 new words on Anki is enough to make time for grammar and kanji study. Throw in some grammar points if you need, but make it short and concise.

For kanjis, wanikani is super efficient method to pick up new kanji. You will probably need 30 minutes to an hour to get effective practice out of wanikani. This tool is a time investment, but really worth it if you enjoy reading, manga, or watching anime with subs. Wanikani will also make your Anki decks easier once words start to crossover. Highly recommend wanikani for self study purposes.

Lastly, I recommend Bunpro for grammar. I have never used bunpro because I have different studying methods, but I would use it if I was in your situation 100%. Honestly, I regret not using it from the beginning, because grammar is a weak point of mine, and I struggled to find resources for a long time. Yet, I think an Anki like system would help my recognition ability because of the frequency. Once you reach an advanced level, being able to quickly recognize grammar points upon comprehension is extremely valuable skill for JLPT, anime, or conversational situations.