I’m sorry to read about the aftermath of your injury. I’m not an expert in physiotherapy and how the effects of these handicaps can be minimized, but here are three people who also suffered an accident that had a lasting effect on their playing style:
They had parts of the fingers on their fretting hands missing (Garcia on his picking hand), and that didn’t stop them from carrying on and adapting their technique to their injuries.
So don’t give up. As you mentioned, the Dm chord already sounds better than a few weeks ago.
