I'm pretty close to purchasing my first handgun, and was leaning towards a Semi-auto, but I've always had a love for revolvers, and am strongly considering getting one as my first gun.
Don't do it.
Learning to shoot one at speed and quickly reload is more difficult than a semi-auto. I know they're neat, but semi-autos are easier to deal with in a fighting role. Competent revolver instructors are becoming difficult to find and it's quite important that you train with one.
I prefer revolvers chambered in 357 Magnum for defense because it's very common and easier to shoot. 357 Magnum has enough recoil to fight and the 44 calibers can be too much. 38 Special works in them. It recoils and costs less, which is good for training up to 357 Magnum. If you only have 6-8 rounds in a full size revolver, make them magnums! If the revolver is small, use 38 Special--but that's not the gun for you.
Now, that said, if you're willing to take the challenge, then go for it.
Don't even think of getting a snubby. The minimum barrel length
for learning to shoot a revolver fast and accurately is four inches. Five is good too, but more difficult to conceal. Six is great for the range and open carry, but not so good under a shirt in an IWB holster. Just stick with a gun with a four inch barrel and you'll be fine.
But keep in mind that you'll need to be more diligent in your training schedule. You'll need to dry fire and practice reloading frequently. Buy a
cartridge tray and at least six Safariland Comp 1 or 2 loaders. Carry them in the
Safariland Split Six holder.
Shooting 22 Long Rifle will teach you about pulling the trigger, but not managing recoil. Make sure to shoot plenty of centerfire ammunition. You'll need to learn trigger reset under recoil; this book will help with this along with other revolver shooting topics:
The Gun Digest Book of the Revolver
Also read
No Second Place Winner since it's still relevant. Bill Jordan also recommends against the 44 calibers, yet strangely promotes 41 Magnum (which I found just as bad) while still recommending 357 Magnum.
Overall, though, the semi-auto is more concealable, trainers are far more available, and they're easier to shoot.
Ruger GP100 in Milt Sparks Versa Max 2. The trigger on this example was great out the box. Try different ones until you find one with a sweet trigger. This is "just right" for personal defense and is the "winner" of the Tom RKBA Carry Contest.
S&W Model 58 in 41 Magnum. Looks great, hard to shoot. Needs better sights.
S&W Model 19 with 2 1/2" barrel. Lots of people love these, but I hated it. It was hard to shoot at speed with 357 Magnum and the training time wasn't worth it. It's the same size as a Glock 19, but has none of the Glock 19's advantages.
Ruger Alaskan in 44 Magnum. It's a great gun for 44 Special, but it's a bit large at 54 ounces. It needed boot grips and night sights. Yes, I carried it in the appendix position.
S&W Model 442. The only thing good to say about this revolver is that it's small and fits in a coat pocket in a DeSantis Nemesis. It's terrible to shoot and needs many upgrades to make it shoot as poorly as the S&W Model 19.
S&W Model 24 with 3" barrel. This is my favorite gun to not shoot. I had night sights installed and the charge holes chamfered. I added Herrett's Stocks' Jordan Trooper stocks for carry. I don't carry it because 44 Special is too much for the reasons outlined in
No Second Place Winner. It lives in my gun safe.