I can sympathize. My dentist even remarked on the appearance of my hands when I was explaining I had to find al alternative to flossing my teeth!

As for the walker, have you considered an upright walker, often known as an "up walker" or "rollator" - many of my friends with mobility issues use them - it improves posture and you actually maneuver the walker with your entire upper body, with forearms resting on cushions. The only gripping required is to brake. Two of my 80+ friends actually walk a mile each morning on fairly flat terrain using theirs - something they could never do with a traditional walker.