My husband has a good job protected by a union, he used to get A+ in university, but due to anxiety problems, he is stuck in an entry level position. His anxiety and panic trigger is connected to employment. There are lots of benefits staying at the job where he is now: he has a great benefit package, even though salary is low, it's a job he actually loves and he loves many of the people he works with.
All this to say, perhaps you don't have to shoot for the sun. Perhaps the moon is enough. Be gentle with yourself because you DO have a disability or illness that is an extra obstacle to overcome. Take good care of yourself and don't give up.