At 67 and first gun
A lighwteight revolver
Hammerless
Most older folks hand strength is weaker,,shes a woman without gun experiemce, racking slides is not good
I have a bias to the ruger lcp 38+p, grip absorbs/transfers recoil well, not intimidating to learn to use
There may be other good lightweight ones as well
On the racking slides business, that may not be as important as it seems- I prefer that my wife has a heavy gun, for recoil reduction purposes, and she is limited to 15 rounds. She knows that, and she agrees that the recoil reduction is more important. She totes A Beretta 92FS. (She would not carry a spare mag anyway.)
For low recoil, a 4” instead of a 2” barrel works wonders.