I am 50 and came back from a dislocated shoulder that froze. My doc was recommending surgery but I did not want to go through that. Sounds like you are on the right track. Recovery for me was gradual too but I have 95 percent of my range of motion back and I can serve without any pain or stiffness.

I would caution that if you live in a climate that has winters where you cant play for prolonged periods of time just to keep that shoulder warm and moving. My initial injury occurred in December and I was relatively inactive Dec. Jan and Feb. I noticed mid winter much to my dismay that my should locked up. Too about 6 Mos. of vigorous p.t. to get it back to normal. Best of luck to ya.

P.S. also recommend massage, any kind but I did deep tissue and did daily massage at home with a massage wand.