Like Don I shattered my dominate right hand wrist and lower arm three years ago. I have so much metal holding it together I cant bend the wrist, nor move it side ti side much.
I did the PT for 2 months. Lots of things I can pass on. Wash dishes in hot water as hot as you can stand it. It warms the muscles and helps ease pain. In fact before any time you want to really use your hand, soak it in hot water for 10 to 15 mintes.
Next being able to control movements get some silly putty we use to play with as kids. If not it’s not to expensive to buy on Ebay. Ebay will have it as therapy putty. Just squeezing it helps to strengthen your hand but the movements of fingers and hand need more. For that get small objects like beads. Flatten the putty with your bad hand into a pancake on a table top. Place the beads one by one on the pancake with the bad hand. Still bad hand roll the pancake up into a ball burying all the beads. Oh make sure you know how many are in it. I did 20 at a time. Now with your bad hand ( when I say bad hand do not use your good hand to help it. Just the bad hand only) pinch the putty to find the beads and force them out. The first half will be easier than the last ones, so dont give up.
Get some old fashioned spring clothespins. Practice trying to open them. As you can hold it open for a few seconds, place them onto a cord strung up like a clothes line. After you get them all on, you now get to take them off.
Get a tennis ball. You can use the palm of your hand to roll it on a table. Try bouncing it on the floor and catching it. You can also squeeze it. It’s harder so only do the squeezing once you have gained a lot of strength.
Get a cribbage board with pegs. Practice with your bad hand putting those small pegs into the small holes.
Your shoulder on the right side also most likely has problems. Have a friend who does wood work, make two boards for you. One that has one inch holes in a line drilled into it. Then get a piece of dowel that is one inch in diameter. You’ll have to nail the board on the wall. Oh hopefully the board is 2 and a half feet long. The height of where it gets nailed on the wall should be with the bottom of the board about level with your shoulder. Now you get to start at the bottom of the board and put the dowel into the holes ( forgot make the holes with an inch between each hole) it gets harder the further you go up. The other board would have little strips (one inch by one inch the length of the short side of the board nailed to the board with a 3/4 inch spacing. This board nailed to the wall with the strips turned outward. For this board you will walk the fingers of your bad hand up the board.
Those things should be enough to get you going. They also work for your better hand just do them separetly.
Now that you would have worked your hand with the goal of 3 repetitions of each exercise. You will hurt. Reward yourself with a package of frozen peas. They make great ice packs that you refreeze. If the bag gets a hole, use duct tape to patch it. Just put a bag under the hand and one in top. Oh and put a small cloth top and bottom of your hand to protect against the surface of the bags of peas. 10 to 20 minutes of icing is all you need.
Another reward is to message you hand. This could also be the starting point if you hand cant flex well on it’s own. That is opening and closing it while not holding anything. Let me know how much you can do, and I’ll back track and get you moving it. That from when I had carpal tunnel surgery in 1990.
Sorry it sounds disjointed. My foot needs surgery and I took some pain meds an hour before. Hope all goes well. This takes time so compare one week to the next, not day to day. It might take you a year to see how far you can regain usage.
Aggie, breathing easier now that hurricane Dorian made it’s right turn