Go to a gun shop, with counter people that you know and trust, that has a really wide selection of guns. Tell her to have fun, you'll meet her back in 30-40 minutes.
When you get back, she'll have found the gun that she likes best. Worry about caliber and such later, for her next gun.
When you get back, she'll have found the gun that she likes best. Worry about caliber and such later, for her next gun.