I've had two knee scopes already, not even 24 yet. From my experience, what these guys said is fairly good. Be prepared to take your time, around 6 months before you can squat any significant amount of weight (will vary depending how well and fast you heal).
This is basically how I progressed after(high reps for all these): Some specific exercises the physio gave me that I cant remember sorry, Bw partials, Single leg partials, walking through waist deep water, Bw lunges, Bw squats, light lunges, light squats.
Then I hopped on a program that had me squatting 3x a week, started with just the bar.
Leg presses, extensions, etc aggravate my knee, might be different for you.
There's heaps of other things I couldn't do until recently, like running.