For myself, with ADHD, the key was not doing it alone. Working through coursework and homework on a literal blackboard with colleagues from the same class. Just thought I'd add in case anyone felt dissuaded or needed something to try.

It really was the savior of me. I can focus for hours when I get into something, but its the friction of starting up that I found other people really helped with. There are formal names for it, like "body doubling", but I didnt know of that, I just knew it was critical to work together with others to get stuff done, which as the above correctly writes, absolutely must be done.