Glad to know you've recovered from most of your injuries and I'm hoping what's left of the numbness will subside, too.Pretty much all recovered.
I can play guitar fine, and the only “leftovers” from the dog attack are a lump between/behind the knuckles of my left hand ring and middle fingers (it looks like a misplaced knuckle), and the numb to the touch area just behind my little and ring fingers on the back of my left hand.
The numbness in my fingers has gone away, so this last numb area likely will at some point. The longest time for nerve damage in my hands that I can recall was @ two years for numbness to go away.
As I recall; you had a much scarier K-9 encounter than I did!