In reply to Exocet:
Not as serious as a hip replacement I know but last April I had a capsular release op to the shoulder (to free a frozen shoulder after a bike crash) and the consultant told me "your recovery is entirely up to you now". The shoulder joint is not a perfect ball and socket like a hip and although I'm no medic I suspect the supporting ligaments play as or more important a role in holding the ball into its shallow socket. So I set myself a routine of stretching three times a day, lying flat and allowing gravity to help me raise my arm. It hurt but I knew the pain was worthwhile so kept a positive attitude to it. I'm pleased to say that eight months later I have full ROM although still a little stiff and sore and clunky, but the surgeon told me all of that should be OK in about a year.
Good luck! Paracetamol is your friend, an under-appreciated drug but very effective if you take 1gm every 6 hours and keep a record of times on a piece of paper.