Do your physio, don't overdo it, knees are complicated.
Just be really careful not to stuff it up, a physiotherapist once said to me "it is like darning in a sock, you try to hard and tear all that darning before it is finished". So don't do more than they say.
I don't believe in taking pain meds unless necessary. Pain tells you when you are doing damage, that's useful.
In september I had an osteotomy, graft and plate of my radius, graft was taken from my pelvis. That was on Thursday. I was commuting to work (cycling to the train station) and working at a desk by monday.
Be cautious, and gentle and it's ok.
This getting older lark isn't for cowards, is it ?
Every damned silly thing we did in our youth suddenly rears it's head and says, "Mind you thought it was fun ??, well you're not laughing now!"
Sorry it's been a sore time, and that though it's healing it still has limitations.
I hope the Summer helps it all settle well though.
Right now my back and hip are a crippling misery :/ and I watch the children running around and climbing everything in sight and remember how it felt to have joints that were spring loaded and tireless To run all day long, and sleep curled up all night long.
A new boat sounds like something to look forward to, no ?