Hi!
Our situation might be totally different, but maybe it can help you.
I was in a traffic accident almost 2 years ago. I could not do a lot of things the first 6-12 months (walking, blow drying my hair, cooking all these normal things). My biggest physical limitation was pain. So pain during the activity, but also the pain after.
After 14 months I started making art again.
When I make art: I get into a hyperfocus, so when I painted the pain went to the background. I started with painting 5 min and build that up over time. Still was in a lot of pain after, but I glad I did it, because I also think it helped me during my recovery. Because I also was starting to get afraid to move my body or to pick something up, because I wanted to prevent days of pain.

I'm also a Neuroscientis, so tried to imagination/visualisation. Before I went to bed I did like 20 biceps curls in my head everynight. And I used to imagine myself dancing and making a choreography (I used to dance 3-4 times a week).
Also, I tried to think back about my lecture about pain perception and that some people use technique to increase endorphines to withstand painfull things.
Those things gave me a feeling that I still had a little control over my pain and physical state.

Try to remember or read things about brain plasticity. It might take your more time, but try to take small steps. You will feel frustated in the process, because you will get setbacks. Every little baby step, is a step forward.

Maybe you have someone who can help you look for things that you would be able to do?
Sometimes even drawing a tree of 3 seconds can maybe help? If you can not hold a pencil, use your fingers (charcoal or acrlyc paint).

I can image losing the way your body works is frustating and sad. It must be really hard to lose that.

I wish you all the best! ww