Dh only has the use of one arm/hand and it is his non-preferred hand that he had to get used to using.
He can do everything unaided, pretty much. The only thing I do for him is cut his finger nails.
He also can't give the children doses of Calpol from a bottle (can't hold spoon and pour liquid at same time) but can use sachets.
When spreading butter on toast, rest the toast up against something solid e.g. edge of hob and spread towards the hob.
Use a damp cloth (or dycem mat) under a bowl when mixing or eating something, it stops it from moving around.
Put your affected arm in clothing first and then other arm and then over your head.
There is even a way of doing your shoe laces one handed if need be.
Obviously, you won't be able to drive (dh does, in a adapted automatic car)
Any other questions, let me know.