My meniscectomy was about 12 yrs ago and I went bone on bone within 3 months after it. I had 2 or 3 PT sessions. What your dr. told you is what the PT told me. Squats, lunges, twisting and turning and pivots are all bad if you want to keep your knees. I would add jumping and maybe running as being bad but you'd have to be the judge for what you can do.
I wore those stockings after the knee replacement. Wearing shorts and stockings were good enough with snow on the ground. I have thermal underwear that aren't as warm as those stockings. I feel for ya!
Hang in there and behave
and you'll be good as new in a few weeks.