Sorry to hear about the fingers, but assuming you still have your pinky and thumb, I would think that you could still get a roll and paddle <III water. Yeah never know... maybe if you can still make a good enough clenched fist you could handle bigger water.
The key is to take winter roll clinics and really get your roll down before getting into moving water.
Confluence does a great job depending on where you live.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body. But rather...To skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming... WOW !!!! What a ride!!!!!!"