Comment by friedtofu

Its been a while since this happened but I laid my motorcycle down, ended up fracturing my wrist. Honestly, if you aren't used to one handed typing its not worth the time to train to get good at it(I'm assuming they're right hand dominant) its all just muscle memory. If they can pick it up quickly go for it, keyboard bindings, or something like predictive text assistance, or even vim-like remappings are an interesting idea.

IMO - if possible just peck-type(like an old lady who is learning to use a keyboard) or use text to speech/AI & editing where possible - like in emails. They shouldn't be using the left arm/hand much right after surgery anyway. If they're programming definitely not as easy but still doable.