Most of the sports girls who play for more than hour games, sweat a lot during game. So they prefer long underpants, breathable material, protect from friction between thighs.
You may want to start by wearing clothing that is well fitting, but not too tight, and is made of natural fibers (Cotton) so that the skin can breathe. Skin can chafe against loose clothes too. You’ll also want to make sure that areas prone to skin chafing, like between the upper thighs, are protected from each other. Choose undergarments which protect the legs from rubbing against one another.