sorry man, that looks nasty.
I had a freak stroke when I was pretty young and had to learn how to use my left side until my right was back to snuff. I won't say it was easy, but it was easier than I though it would be, when I really tried.
To be honest with you, brushing my teeth was about the worst part. I hated that with a burning passion. And now that I'm all better, mostly, I can do nearly anything with either hand. Some things I even changed my dominant hand (I find myself eating lefty a lot).
So look at it this way, at least when your finger is better you'll be able to shoot like Red Ryder.