I sympathize with you I had shoulder surgery a couple years ago - I am as fully recovered now as possible with just minor loss of stretching - I am starting Yoga and getting a little better with it. I watched the people with painful knee surgery in there recovery and it seemed so much harder then I had. I feel down the stairs in Oct and injured my knee which still hurts.
I know we can both do it, I hope you hang in there. I am new as well.
Sounds like you are on the right track.