Have a look at controls for automating your clutch if that’s the problem/reason you are after an auto. I don’t recall the name of the company I last looked at but there are, (or were) a few that did modifications to add a lever or button on the gear stick that worked the clutch for you. Look at mobility specialists or maybe racing equipment people to see options.
It won’t be cheap I expect these days but will be cheaper than difference between a manual and auto gearbox. Bear in mind the modification may increase
insurance although that was all supposed to stop when they brought the disability discrimination bill in.