Danbob,I too admire your determination and believe you will be able to do this and possibly more.
Someone very close to me last their right arm just below their elbow last year. He was interested in shooting and has shot a few22 matches with me before the accident.
So I made a stand to hold the 5 Ruger 22 mags and also put and attachment on it that he can cock the pistol with. I just used scrap lumber and stuff I had in my shop. I will get some pictures tomorrow and try to post them. They may too large to post so I might have to send them to your email.
I would be happy to be of any assistance I can to help you get to where you can shoot matches safely and enjoy them.