There’s a “no burnout” user script that prevents you from doing too many lessons at once. You could give it a try.
Edit: There it is. See comment below.
Edit2: I feel my point isn’t super clear.
What I meant was that the script will reduce your lesson pile to something manageable. Once you are done with that, more lessons from the original pile will become available and so on until you are done.
It will slow down your progress if you set it too low, though. It’s up to you to know what feels comfortable.