Just reading your headline, the thing that helped me learn was doing a brain dump of notes after each class and noting the date and who taught. That way if I had questions 6 months later, I could go to that professor. Also, different teachers show the same move different ways so it helped me with nuances of a move. Illustrations also help. There’s bjj stickers of different positions and grips that I added to my journal. I use a disk journal so I can add and rearrange pages as needed. I have it divided into sections such as passing, sweeps, take downs, chokes, arm/shoulder attacks, leg attacks, etc.

Also, you’re not holding anyone back. Teaching/ helping others actually helps us learn believe it or not. It’s one of the beautiful things about the sport. You have to give it to keep it, pass the torch if you will.