I am so sorry to hear that you suffered such a horrible accident. I know there are many that trouble with mobility, arthritis in their hands.
I have minor health issues compared to what you are dealing with. I did to have a hip replacement last year. It was only really hard for the first 6 to 8 weeks. I would carry my produce on my walker, and hooked up a big tote bag in the front. I could put a cutting board, knife and bowels in it. I would just roll my self back to my chair. Set my self up, chop up enough for a few days. Put in the bowls, roll everything back to the kitchen. Put in the fridge. It is a good way to get things done when you can't walk well or stand for long.
I do have that energy issue so I try to get want I need done in the early part of my day. I just do things in short spurts. When I get tired I stop and have a good rest. I am glad you don't push, it does make us more prone to have an accident if we get too tired.
It is so true we just have to deal the best way we can. I bet you do very well with the adjustments you have had to make.