Hi Cadence Mercado,
I know that very well, I have it with online classes, but I also had it all my time at university. What I did at university was, just writing notes with pen and paper. Like pinning down everything down almost word for word, It just kept my brain on the topic having it run through my hand. Also, it really sticked to my mind than. I never did anything with that notes, just dumped them afterwards.
Doodeling helps me to, but sometimes I just get lost in my lovely doodles. What also helps, even though I don#t like it, is doing something else with my hands. Like knitting, crocheting, pulling those little bumps off from wool sweaters, peeling apples, Prepaing templates, preparing my bullet journal, sharpening pencils, cleaning wax of a candle holder, sanding some paint of something. It is up to if I need to have the camera on. Sometimes I even do dishes or stuff while being in an important conference. you just have to make sure, you turn off your microphone Some little taks which doesn’t involve my brain, just my hands. It actually helps me focus on what is beint said. I actually prepare a taks before a conference. Like have potatoes ready and peel them under the table. Sometimes it also amuses me, that people think I am just listening and I am doing something stupid like peeling potatoes. It gives that little extra challenge to do it unnoticed and stay focused at the same time.
Or I clean up my email account. Not reading just dumping old emails.
Hope that helps.