Sounds like you're doing good on the eating! I wish it was always easy!
And I hear you on the knee. I tore mine up trying to run on a hard track while carrying too much weight... not good. I have one knee that crackles going up stairs, and the other knee crackles going down stairs.
I can do squats now, although for some reason my knee doesn't like lunges. Squats that go below parallel are safer than staying at parallel. And supposedly box squats (where you actually sit on a box) are safer. I keep meaning to do box squats instead myself, but I have a tendency to forget until I'm done and have that V-8 moment.
Good work on the push-ups! I can probably do 10 sloppy full push-ups nowI know I don't do them perfectly, but these things take time, right? I'm hoping to be able to do a good pull-up some time next year, but I know it'll be a while. My gym has an assisted pull-up machine which I use. Although I hear people recommend using bands for the assist rather than the machines... I haven't quite figured out how to make that happen though, so I make do with the assist machine.
Don't give me too much credit. I had a hard week which ended in diet terror, but yesterday I got and assembled the recumbent bike my parents bought, and I'm happy as a clam about getting started again!
And I'm all about V-8 moments, trust me. Outer disorganization leads to inner disorganization, and I'm bad about getting into a tornado of confusion! I'm working to get out this weekend, though. I have a lot of work to do next week and two finals to study for on Friday. Who knows how I got so passive about my grades this semester? It's not happening again.
Also, I think you might use bands by leaning back at a 45 degree angle and pulling yourself up. I think I saw something like that on a TRX commercial (which I copied with those straps you use to keep ATV's in your truck). Good luck to you!!