knee surgery

I had a surgery on my knee where they had to go in and clean things up. The doctor said that I cannot weight train for the next 2 to 3 months but he said it was okay to do a little upper body work but I had to be very careful not to mess with my legs. I'm worried about losing muscle in my legs...

I was running a steroid cycle and had to stop it because I jumped and when I landed playing basketball I felt something pop in my leg. I have a torn meniscus and I have surgery plan for next week. I was wondering what kind of supplements I can take to speed up my recovery so I can get back on...