Lessons are item you are allowed to study, not lessons you have to study.
NO! GET IN THERE AND GET THOSE LESSONS FINISHED! NOW!
If it is too much for you, just don’t do them right now
This feeling never goes away. It does lessen and start to grind down over time but even today when I level up I feel this shot of excitement that I’m leveling up, only to fall into the gentle horror of… 50-160 new lessons!
Then I pick myself up, get back on the horse and keep on trekking!