let her try a lot of different guns.
for the newbie a 3 or 4 inch barrel is much easier to manage,
If she gets her ccw and is going to carry, then look at the new purses made for carry, but then also get her to consider that at the grocery store she can not set the purse inthe cart and not pay attention to it ALL the time. My wife purse carrys, but she has gotten in the habit that the purse is ALWAYS attached to her. with the strap over her head in the cross shoulder carry. my wife can hide a Commander in her purse NP and has carried a 4" 686 in hers too.
As far as loads. what ever you do, start her out with light loads and let her shoot enough to work up from the starter loads till she decides she can not go any higher. My wife and my daughter now have no trouble with full house 44 mag loads IF they have been doing their practicing and they are only shooting a few. When we go in the woods it is not big deal for them to carry a model 29 because they know if they shoot it is going to be no more than 6 shots and only if they have the worlds biggest adrenalin rush.
My daughter thinks a 45 commander with +P 185's is fun. So just let her work her way up. Getting a 22 that works the same as the carry gun is not a bad idea to just train with. quiet and no recoil, they help train without the fear of developing a flinch.
as far as a home gun, look at the remington express youth and Junior shotguns, very good guns at a reasonable price that she can also use to break clays with to get the hang off
The NYPD found out that new shooters got something like 50 % better scores when they started on a 3 inch verses a 2 inch barrel. I can not find the link to it but i remeber reading about it many years ago, one reason the 3 inch chiefs was called the NYPD model.