I'm not sure I understand this correctly
But what you are describing is pretty normal
It sounds like an intensive course, like a crash course or something. I did my post grad on top of a full-time job and I was fucking exhausted and overeating all the time and then going to bed when my brain wouldn't take any more.
I don't have a disability, but at that stage of life, I was not medicated for my anxiety and depression.
I'm sorry if this is completely irrelevant, but I'm not 100% sure what you're saying.
It sounds like it's designed to be intense, so it's intense? Do they provide materials and note that you can keep hold of and study later?
I agree with the poster who said structure is really important. I find working from screen based materials much harder, I'm a big fan of paper! But if I've got to read a bunch of stuff on the screen, and actually take it in, it helps to read it out loud.
Do you know what your concentration span is like? So are you better sitting down for 20 minutes and then having a break for five? I'm better doing 45 minutes and then I have a break for 15.