Hi Dave, welcome to the world of wheelguns!
I started with sixguns many years ago, wandered off into auto's, now I have a smattering of both, and I'm happy with my options. Autos may hold more but that's necessary for me, because I shoot revolvers a lot better, hence don't need as many shots. All my wheelguns hold five or six rounds, there's something sacreligious about an eight-shot revolver! Unless if course it's a 22. Personally, while you have lots of choices in what to buy next, I'd suggest a good 22 revolver, prefereably a Smith. Lots of companies make good revolvers, but only Smith makes a Smith!
I also own a Rossi, a 38 3-inch, that was passed down from a dear relative who never shot it. It needed a trigger job badly, but after doing one, I can keep all five shots on a paper plate at 30 feet, about the farthest I ever shoot it. My Smith is good for soda cans out to 75 yards, the Rossi is not. The Smith also has my best-ever trigger job and is more sturdy, hence it holds better. It is a 65 three-inch, what I consider the best all-around packing/house gun extant. The trigger on this gun has to be felt to be believed, the first question I get when people try the trigger is, "does it ever misfire?" because it feels too light to be reliable. And no, it has never misfired, in something over 5,000 rounds of factory ammo and assorted handloads. A great trigger can make an average gun into a wondergun, you might look into that if your Rossi is a little rough, or feels too stiff.
Shooting 357's out of a snubbie is not a joyous experience for most folks, me included. I generally shoot 38+P's out of my Smith, and standard ammo out of the Rossi, to keep the evil flinchies away. But the first requirement for a defensive gun is that it fit my hand, and it took awhile to find the right grip for small hands with very long fingers. I settled on a Pachmayr Compac grip, it carries well, holds securely in a IWB holster, and gives me a secure grip. But you have to figure out what fits you best, try as many as you can get your paws around!
Good luck, and welcome to the round-gun club!
Papajohn