So sorry to hear that Larry, both the theft and your health issues. Like some others have said, maybe try a smaller bike, I know it's easy for other to underestimate the problems some have and suggest 'easy fixes' so apologies if this sounds like that. I'm fortunate to have the choice of a few bikes and end up on one of my smaller/slower bikes for 80% of my riding, somehow they just seem more fun.

Message me if you want to chat about some of the bikes i have and maybe I can pop up with one in the van for you to try