if you go to a university, they usually have disability services to help with this kind of stuff. i’ve been able to have note takers, use audio transcription devices, record lectures, turn in assignments past due dates, have extra time in exams, etc. most professors are also understand if you talk with them before class starts about your hypermobility issues if you can’t get an appointment with disability services. question: by computer based do you mean like a computer technology course, or a course that is being held virtually? this will change the advice i have going forward.

Finger splints! There's a lot out there that look like rings and they help to stabilise your joints for writing and such!

I have tools that let me dictate assignments, record lectures and all sorts. You just need to ask :) and I have a friend who wears cycling gloves when she types for her hypermobility, cause they are a little tight and keep her knuckles in place