First of all: don't get your hands dirty, you can use gloves as you will have to use one of your hands to stretch and push the stencil.
Just a glimpse of how your hand will look like If you don't use any gloves.
I also advise you to use a 3M gas mask with a niosh filter (with a black stripe) as spray paint always have some toxic fumes that can't be prevented with regular paper masks. Please take care of your health, you will thank me later.