First, a concealed weapons course that involves shooting a course of fire. Novices often do not know what suits them until they handle the gun and get to the range and shoot it. I have had many novice students, men and women, show up for a class with a gun that someone else chose for them only to discover their gun did not fit, or they could not operate the action. Often the recommendations came from a gun counter clerk or a friend who was well meaning but just didn't know. I was especially frustrated with the person who showed up with an Airweight revolver, only to discover they could not tolerate the recoil. I always had a selection of handguns for my students to handle and try for fit, and to determine if they could operate the controls. My test for suitability for hand strength was to have the student operate the slide to its full limit 10 times in succession. If they could not do that they were probably not suited to a semi-auto.
With that said, you would be hard pressed to find a pistol today that beats the Sig P365. If hand strength is an issue, the S&W M&P EZ is an option. And of course, steel revolvers are always an option for the recoil sensitive.