Yahhh ok choosing a light pistol if you're a beginner and a person of a small stature and small frame is a really really really really bad idea. The reason is physics, a firearm gives as much energy in recoil as the bullet moving forward. So the heavier the firearm the steadier the barrel and less felt recoil, therefore you don't develop a flinch.
You don't need anything fancy like magical systems or short reset triggers or Han Solos magic blaster or a 2000$ kimber, gold cup or competition sti. Just get her to shoot a cz75 shadow and buy it for her. She will actually shoot what she's aiming at. It 875 bucks, and the cz75 is one of the most underestimated best pistol platform ever created.
Plus you can customize it with nice colourful grips to match her nail polish.
I would not, read not at all, recommend a polymer gun (sig, glock, m&p) not for a beginner and not for a small frame person.