First off, just looking at those pictures…Ouch. I hope they don’t hurt you OP.
Some suggestions I can think of:
- Hiking if there are any places near you and you can get to them.
- Woodworking? Not sure if you can do it because of your hands.
- Gardening/Landscaping. I gardened this summer and while the effort was minimal since I didn’t plant much it was kind of rewarding. I’ve done a bit of landscaping (laying interlock) and it was also rewarding.
- Running and/or swimming. Not exactly mentally stimulating I know but don’t discount the endorphin boost.
If you want you can try also asking this question at the !fitness@lemmy.world community.
How about home improvement? If your living situation or someone close to you, like family, allows for it why don’t you look into that? You can do things like changing lights, old doors, paunting, etc. Depending on how comfortable you are you can look into some more complex projects. They can be pretty physically demanding and you’ll be active for a long time.
Best of luck in everything, hope you find something that works for you.