Rent some that fit your hands and then worry about concealability. If it's too small to control, it'll be useless for its intended purpose...too large and you won't carry it when needed. For our family, the S&W J frame revolvers fit the bill.
The old revolver vs. automatic goes like this: revolver...simple, point and shoot, no safeties, magazine's, racking of the slide and ammunition reliability issues. Automatic...flatter and that may help concealment wise, larger magazine capacity, and quicker reload.
For a woman with weak hands or a man for that matter, or anyone who's not dedicated to the shooting sports, the slide racking, and complexity of an automatic may be serious issues. In the heat of an unthinkable encounter with thugs, you may not have time for complexity. A revolver made sense for us for the above reasons, and a two inch barreled J-frame is every bit as concealable as the sub compact autos.
Here's one solution...light with that alloy frame, all but waterproof...and accurate...it's good for sub 2" gps double action from the 15 yd line. We've since put Crimson Trace grips on it for night use...it's my wife's gun.
Rod