Worried I can't go vegan for medical reasons. Any advice?

I see a lot that everybody is able to become vegan if they just try it but I truly worry I am the exception. I want to go vegan due to my own moral/ethical beliefs, but I have a very limiting disorder that means I cannot eat a LOT of stuff. I cannot eat protein. Due to this I am already vegetarian. A lot of evegan foods or substituts I see are VERY high in protein (anything over 2g of protein is not a safe food for me. I can have 10g a day). I highly doubt th foods I eat right now (specially made foods for people with my condition) are vegan, though I'm not too sure how to check.

Any advice is appreciatd.