She definitely should try a variety of handguns.
One that hasn't been mentioned yet, which my daughter of a similar age settled on and likes, is the Beretta PX4. My daughter has the compact which, like the full sized (but not the subcompact) has a rotating barrel which softens recoil. It also comes with three different backstraps which allow the owner to customize the grip size to some degree. Fit and finish, accuracy, and reliability are all excellent. It is kind of an under-appreciated model, IMO, and worth having on the tryout list.