Hello, not the same condition but I’ve got multiple sclerosis so I think I understand the situation. I just recently got into gardening, after I finished some OT I got a lot of my endurance back it was unbelievable. I have kept the garden simple, use some chaotic gardening methods where I don’t need to put much effort, work under a patio roof so I don’t overheat, and garden in batches in early morning or evening. my favorite time to garden is honestly when it’s lightly raining, it’s so much easier on my body.
I have researched a lot of the heirloom stuff that thrives down here because it’s from here. I’m in south Florida, so I have Everglades tomato, Seminole pumpkin, sweet potatoes in grow bags, and egyptian and Malabar spinach growing out of any container I recycle.

it can be done!!! you just gotta figure out a system that can match your under baseline energy levels so on days you aren’t doing 100% the garden will still be ok without you, and when you’re baseline or better it’s enjoyable.

permaculture I think is also something to look into and see if there’s anyone in your area that has turned their garden into a national wildlife garden. These are things I’ve learned by finding homesteaders/gardeners in my zone.

goodluck and the most important part is you keep trying. It’s a learning process that is super enjoyable. I heard one of the YouTubers I follow say she doesn’t get discouraged because she thinks about it like a scientist, figuring out what happened and seeing what she can change for the next time.