I hear ya, my laundry issues are more physical. Big pulling arm movements and bending up and down for the dryer cause increased shortness of breath. The only answer I have is Slllloooooowwwwww, slow everything down. The cognitive part of matching socks is actually a great brain exercise my occupational therapist would approve of. She also told me to sit while folding clothes. OR, I don't fold sheets and towel, I just put them back on the bed. I use hangars rather than folding for t-shirts. Also, as I am not able to be as intensely physical as I was, my clothes are just not as soiled. It is ok to wear t-shirts, sweatshirts, jeans for several days to decrease laundry.
Puzzles are helpful 'exercise' for the brain. Get a puzzle you can leave on a table and return to, or do them on line. Word Cookies, Crossword, Flow Free, Block Puzzle, visuospatial games, sudoku, games for seniors are great for following patterns, shapes, colors. It is like weight lifting for your brain.