Like @sspoom said, in general, a .38 special and an 9mm are very close, when it comes to ballistics, and they both have a wide variety of ammo available. But a .38 special is meant to be used in revolvers, and 9mm is meant for autoloaders. I'm sure there is a Paul Harrell video comparing them, if you want to search his channel. The reasons I recommended a .38 special to you have already been stated: revolvers are a lot simpler to learn to use than semi autos. Basically, you just pull the trigger and you have five or six shots that are almost guaranteed to go bang.
The .32 Long ammo you are talking about for a .32 revolver is rare, hard to find, and probably more expensive than .38 special ammo. I could probably find a dozen shops, both big box and gun stores, within a 20 minute drive from me in Podunk, TN that could sell me a box of .38 special ammo. I bet I would be hard pressed to find one that has a box of .32 Long in stock. No demand for it.
The .32 Long ammo you are talking about for a .32 revolver is rare, hard to find, and probably more expensive than .38 special ammo. I could probably find a dozen shops, both big box and gun stores, within a 20 minute drive from me in Podunk, TN that could sell me a box of .38 special ammo. I bet I would be hard pressed to find one that has a box of .32 Long in stock. No demand for it.