Then in university it was too much information to not take notes, and I started on my own again, in my own way. Most importantly there was almost no structure, and very little detail. Never take notes in full sentences, just keywords that are semi-digestable to you, and in math there were lots of equations and diagrams. Secondly I got a tablet with a pressure sensitive pen. This allowed me to still take hand "written" notes that looked and felt like my real handwriting, but I didn't have to deal with trying to organize my notes in real space, which inevitably would end up crushed at the bottom of my backpack or strewn around my room; digital notes are self-organizing.
The only point of creating any sort of reference material is to increase the likelihood that you'll be able to recall the information later. Handwritten notes are one of the many possible ways to do this. I find that re-designing an abbreviated textbook and splitting all information into tables is the only way that I can reliably learn, but I didn't think of that in school and thus struggled some with grades.
With ADHD, I've always struggled with consistency and memory, and what's been helping for a few months is to start my day by writing it out in detail, so I'm forced to work out the kinks.
[1] https://en.wikipedia.org/wiki/Attention_deficit_hyperactivit...