My wife carries a Glock 43, it fits her hand perfectly. Being 5'2" she has a short trigger finger.
Hand strength for slide operation of semiautos can be an issue, Smith & Wesson makes their EZ series in several sizes and calibers.
The Ruger LR Revolver is another compact easy-to-run choice.
A lot of firearms now come with replaceable grip panels to get a better fit, including H&K, Beretta, S&W, Steyr, and Walther to name a few. Smaller pistols are harder to master and generally less comfortable to shoot. The biggest they can hold is better than the most compact.
The best way to pick the right pistol, IMHO, is to shoot them, buddies or a rental range are great, because fit and feel at the gun counter are not the same as actually firing.