Hi Calee,
I had the surgery at the end of January. I pretty much stuck to just following the doctors stretches and exercises for my knee for two weeks. I continued to do upper body workouts through that time. According to my calender, I was trying low impact step workouts without any platform the third week, along with some stationary bike work. Oh, and some yoga to help increase the stretching.
The improvements seemed to come in spurts. I'd wake up one day and find my knee felt a lot better, then it would feel the same for a week, until I'd notice another big improvement.
I think I started stepping with one platform at 5-6 weeks. We took a vacation to the Caribbean at 6 weeks and I did a lot of hiking and snorkeling, which seemed to do wonders for my knee. Good excuse to take a vacation, don't you think?
I'd have to honestly say it hasn't been until this week, 10 weeks post surgery, that I feel like my old self when stepping, but I had to deal with a bout of shingles a couple weeks ago, that set me back some. I used an 8 inch platform for the first time today. My knee still feels stiff, and it makes a popping sound sometimes, but it doens't hurt or feel weak.
Good luck and try not to get discouraged if you don't think it's healing quickly enough. Believe me, it will!