My supportive thoughts go out to Mary. I had a stroke (aged 69) in December, lost the use of my left arm and leg but it soon started to come back. they got me walking again in hospital, albeit with support. By March I played Shady Grove on my banjo at the folk club I run. Music and playing an instrument is terrific therapy. My "watch-word" is "little bits". I just do a few minutes at a time but as often as I can.
The damage to the brain means you get tired very quickly and easily but if you keep at it, the stamina builds slowly but steadily. Even my fiddle playing is coming back but you wouldn't want to hear it yet. It's music to me though. I find the melodeon and the whistle hardest because I don't have full sensitive feeling in the whole of my left hand fingers. I can feel with the tips OK but the modified bagpipe fingering means the insensitive parts of my finger are needed. I keep trying though. If I have discovered one thing it is that it pays to keep trying. Another useful idea. don't try to measure your success day by day. Month by month is more sensible and reassuring. The progress is real but you have to be patient

Thank God for the music.