I’d recommend a shooter try both a 9mm DAO and a double action .357/38 with .38s. Let them decide which is more comfortable.
This, although I'd say a DA/SA with a decocker only is also a decent option. The main problem I see with polymer striker guns, especially glocks, is that, when held to loose, they tend to FTE. And yes, you even see this in a lot of bodycam footage on the internet. Most of the malfunctions in those videos are induced by limpwristing the gun during a stressful situation.
