Help me set up local AI for my 85 year old aunt who is blind.

Hello all you smarter people. I recently retired and have taken on a task that is going to stretch me a bit. TL;DR My aging aunt is going blind and wants to keep writing stories that she's been writing for over 70 years. I think local AI has the ability to make this possible but I'm looking for a little guidance on the steps and the order. FULL VERSION My aunt is 85 and lives with me now. She has written ove