I am with Steelers87 on this one. I would never start a non-shooter on anything other than a 22 pistol or rifle, and a pellet gun is also a good start. I am actually intrigued by the full size replica of a XDM 4.5" that shoots BB's that I came across recently.
I would start with discussions of gun safety, i.e. always treat the weapon as if loaded, don't point the gun towards people, things that are basic common sense to gun handling, and some of that might be good to do with a replica or with a pistol with snap caps in it. Maybe even get one of those laser cartridge training systems, where you can teach her to handle the firearm, proper grip and trigger safety, etc, all at home. Do that before you take her to a range.
Having taught both my daughters and son to shoot, I cannot stress that handing someone a big revolver or pistol in a large caliber is a bad way to get someone started, and have them shy away from shooting. My kids all learned using my old Ruger Mark II target pistol, which has effectively zero recoil. My oldest still doesn't like shooting anything other than a 22 pistol or rifle, and has no use for anything bigger. My middle kid has a 9mm pistol, my youngest a Ruger LC380 that she carries in her purse.