I think the diet might be different for a lung transplant (not sure). Even though it is restrictive there are many things that I like that I am still able to eat (especially ice cream). I have to watch out for too much potassium while trying to increase my magnesium (even though I take 6 pills a day to raise the magnesium, the level is still low). At least I am able to eat again. While in the hospital, I was given nutrition straight through a central line at first.
Like Rosemary, I had the issue of sitting due to my tailbone sticking out. I had been in a wheel chair for about five months before the surgery plus needing oxygen progressively increasing until I got up to 30 liters upon being admitted to the hospital. I had to use a walker for the first week after surgery (partially to hold the drainage [I had 4 chest tubes], all of the monitors and sometimes an IV, as well). After the surgery, I had over 40 pounds of fluid, but it was all in my legs (my son wanted to pop them with a pin). Due to having A-fib, I wasn't allowed any diuretics.
I bought an eggcrate pillow to sit on the couch and had taken the cushion from the hospital to sleep on. When I first came home from the hospital, I had to try to sleep on my back. It hurt too much to go on either side and definitely couldn't lie on my stomach (the incision from the surgery is what they call a clam shell, they break the breast bone and open the ribs horizontally, as if a clam opening. The scar runs from underarm to underarm under my breasts). I also have to sleep with my feet up due to the swelling (my feet still swell up during the day, but not enough most of the time for compression socks).