Sorry for your disability and upcoming surgery - good luck with that. I've had cancer twice, chemo, radiation and multiple surgeries.

I have a Sony a7riii which is large; but i don't use it as much as I do my all-in-one. I walk, as part of therapy, around a lake daily - roughly a mile. I bought a used Sony rx100 vi which has a Zeiss zoom 28-200 equivalent with a 1 inch center and have gotten some great shot with it. There is a newer model, the vii. the series has consistently been recommended as one of the best travel cameras. If you go used, I'd check with KEH, mpb, or Usedcamerapro. If you want something with a longer range, the Sony rx10 iv goes to 600, but its quite a bit heavier.

Small and lightweight is at odds with top quality images. The more of 1, the less of the other. The 1" pocketable or bridge cameras are in the middle with good quality and lightweight. I favor the Panasonic offerings because of the bang for buck. The ZS100 (aka TZ100) or ZS200D pocketable or the FZ1000 or FZ2500 bridge cameras in particular. The much more expensive Sony models competing are the RX100vii pocketable or the RX10iv bridge. I wonder if the pop-up EVF on the RX100 is too weak to stand up to rough handling. Also, some comment that the Sony menus are not very intuitive. However, they may have slightly better quality images.

The 1" sensor models are much better than the 1/2.3" alternatives (in similar packages) in having lower noise levels, especially important in low light situations.
The bridge models have more "reach" with zooms that go further into the tele range but are bigger.

I own the ZS100 and love it. The only drawbacks for me is that the built-in flashes on pocketables aren't very strong, and my subjects need long lenses, so I also have the ZS80, a 1/2.3" model which allows for longer "reach".