i'd be really very interested to hear about your progress if you would think about starting a log here. i have my feet... but it was a close call and i nearly had one amputated. sometimes i wonder... if i would actually be better off without my feet. i have almost no ankle dorsiflexion or plantarflexion. i can't run. i hear some people run pretty good with prosthetics. be interested to hear how you find squats, in particular.
how about bands? wrapping one end around your thigh and one end around something immobile. might be able to manouver yourself in a way so that it is more comfortable for you to work hard while you are getting used to prosthetics etc.
i'm not sure about that... i've heard it can take a while to get used to bearing weight with them. blisters and tenderness etc at the junction of yourself and the prosthetic. might take some time before you are in the position to load that up. so trying to think of exercises you can do that won't make that any harder but will still give you a good workout.