Hello Martin and welcome to the forum!
You will find that there are many of us (of all ages and experience) who have physical and/or cognative challenges that we are working around. I only started playing at 50 (3 years ago) and encountered many things like dyslexia and transient problems that were similar to focal dystonia (couldn't feel where my left hand fingers were if I stopped moving them and/or lost my concentration... chords are still a challenge!)... happily the aging brain IS still capable of reprogramming itself!! and learning new tricks
I find this area of research fascinating... actually observing the brain making new connections... so feel free to share! Ask a question, and you are assured of getting some very creative suggestions!
As an aside, I (mis)spent my youth in ballet classes learning to imitate movements by watching the teacher in the MIRROR... I play right-handed, but for me to translate the (non-mirrored) hand position of someone sitting in front of me makes smoke come out of my ears (and often brings tears of frustration)... I keep thinking that I should find a left handed guitarist to teach me some chords!!