On the most level (normal level), unlocked lesson timing will be:
- Radical + Kanji part 1: this is unlocked when you level up
- Kanji part 2: this is unlocked when you guru’d the radical
- Vocab: this follows any guru’d Kanji and a bit unpredictable
If you want to adjust your pace and control when you level up, you only need to pay attention to the timing you guru’d Radical + take Kanji part 2. In the mean time, you can take Kanji part 1 and Vocab. And maybe you can distribute Kanji part 1 as well, because unlocked Vocab will be huge if you guru’d many Kanji part 1 at the same time. So be careful when taking Kanji part 2, you want to be sure that you’ve already reduce the lesson count. And I’m sure this way you can get 0/0 before level up ~
Anyway, you can read this thread for more detail My Journey of 368 days (+ The Ultimate Guide for WK 📖 ) - #2 by jprspereira (section 5. Finding your own speed on Wanikani). And if you have time, maybe you can read the whole thread, it’s very eye opening (my personal experience haha).