It must be hard.
However, paralympic athletes pull off remarkable results despite their handicaps: tennis with wheel chairs, cycling with one leg, ping pong with mental disability...
"making stupid mistakes when I SAW the danger and then forgot about it and moved something anyways" ++ This is quite common, also for players without any brain damage. The solution is mental discipline. Think about your move, once you have decided, assume it played and check it is no blunder, then play it. For the impulsive: sit on your hands.
Has anyone else with neurological deficits tried to learn chess, and if so, what has your experience been?
I’m getting really frustrated with my ability to retain new concepts and with making stupid mistakes when I SAW the danger and then forgot about it and moved something anyways.