When my OA was really bad- prior to my THR -I gave up with socks altogether and bought fleecy insoles for my shoes.
After the op I used gadgets including a grabber and a sock thing, but still found it awkward months later.
I didn’t have physio post op just a sheet of exercises, so I paid for Pilates sessions one on one with a coach, with the aim of improving my mobility so I could put on socks, get up from a chair and down to/up from the floor.
Took a few months and I still do the exercises, but it worked.