If your conditions are as crippling as you describe then you likely wouldn't be able to function through medical school, intern year, and residency. Medical school and intern year both require you to be in the hospital in direct patient contact, theres no other way around it. If you turn out to be as severely immunocompromised as you say, that might be a limiting factor. Residency + Fellowship are a long time of training and taking extended amounts of time off for medical issues is going to make it even harder, if not impossible. If you were able to actually make it through training to an attending level, then yes, you could theoretically work as a tele radiologist and selectively read scans as you wanted to. You would only get paid for what you are able to do, but it is a field that is flexible like that.
I would focus on getting your physical and mental health under sustained, long term control before embarking on this ordeal.