I'm sorry. It sucks that your issues are really taking away things that bring you joy.

I have a skydiving friend that has had multiple shoulder reconstructions and more hardware than you can imagine (the latest involved completely changing the joint -- the ball is at the shoulder and the socket is the arm bone) and it's finally worked for her. She was also an avid hiker and hiked often even when she had no arm mobility at all. She did have trouble keeping her balance (and was worried about falling on that arm) on rough trails, but she kept hiking so hopefully you can too.