If you want to spread out your lessons without slowing down your leveling speed a simple method is something like this.
Day 1 do lessons until all radicals are learned
Day 2 do half of remaining lessons
Day 3 do other half of remaining lessons
Day 3.5 Guru radicals and do lessons for the newly unlocked kanji
Day 4 do lessons for vocabulary from first batch of kanji
Day 5 do lessons vocab for second batch of kanji
Day 6 and 7 do any remaining lessons while waiting for next level to unlock
When you reach guru with a radical or kanji, lessons related to that kanji unlock. Thus the amount of lessons available is directly tied to how quickly you’re reaching guru on radicals/kanji and limited by your level. They can’t just pile up endlessly. If you’re getting overwhelmed by the amount of work then limit the number of lesssons per day.