She should be able to handle the P9 or S9 with ease. I'd definitely get her a real caliber gun. The slightly larger size will be much more fun for range and still completely workable should she decide to carry it at some point down the road.
More of an issue is the difficulty in working the slide, many find this challenging.
If you should get a P9 I'm certain it won't have a 7# trigger and if it does just get a 5# striker spring and it should be better.
Many folks think young girl, tiny little mouse gun, I don't subscribe to that. I'd actually lean towards a revolver to begin with, a 3" would be my first choice.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."