+1 on a good .22LR revolver or even a bottom-feeder.
The .22 will allow you to spend long hours at the range practicing for very little money. And it is a good way to test out new ideas (or tactics) with minimal cost.
Rifle and shotgun shooting have little bearing on handgun shooting. While some of the principles are the same, the handgun is harder to become proficient with and difficult to master.
But if you're in a hurry to jump into centerfire guns I'll give an unusual recommendation. As long as it fits your hand well, buy a used S&W N-Frame Model 28 Highway Patrolman.
Why? These guns are built like tanks. The action parts are still generally available and a used one most likely has a nice smooth action. With one of these and a case of standard .38 Special range ammo (130gr FMJ or Wadcutters) you'll have almost zero recoil. Round after round will go through the gun with minimal recoil and that will help you focus on trigger control and sights.
If the N-Frame is too large, find a used Model 686 or Ruger GP-100 whose action is still tight. The L-Frame 686 weighs almost the same as the N-Frame but has smaller grips. The Ruger's grips sometimes fit those who don't like the S&W grips. Same principle - heavy gun, light loads.
S&W Model 28, .357 Magnum
Later on, you can fire .357's all you want. But to get the basics down, to learn to be accurate with
every shot there's nothing like a wheelgun. Once you understand how to shoot accurately, you can do well with any handgun. And you'll have a great home defense gun when you're done.
Once you've accomplished learning to shoot a handgun well and have fired some .38 +P and/or .357 ammo, then you can consider a CCW piece. The requirements are different and you can better judge what will work for you and what won't.
There are any number of excellent choices for a CCW handgun. If you live in the "bad" areas of town, you might want more than a 5-shot J-frame revolver. But I would suggest that a J-frame makes a good 1st CCW gun for the following reasons;
- The 5-shot limitation makes you think about avoidance more than confrontation.
- They are small and light enough (under 24 oz) to keep them with you all the time.
- Many options of where & how to carry (IWB, OWB, Shoulder or ankle holsters, pocket, etc.)
- More discrete if you unholster in preparation for an incident that dissipates.
S&W 1911Sc (now called the PD) lightweight 1911 .45 Auto
If you were heading towards a CCW pistol, I'd advise a single-stack magazine for easier concealment (usually about 8 rounds). Not only do civilian gunfights tend to be short and with few rounds fired, the thinner and lighter guns are easier to wear all day. Recommendations include;
- Colt Defender .45 (1911 3.5")
- S&W 3913/3914 9mm (3.5")
- S&W 457 .45 (3")
- Kahr K-9/K-40 (steel) 3"
- Kahr PM-9 (poly) 3"
- Colt Commander .45 (lightweight 1911 4")
- S&W 1911PD .45 (lightweight 1911 4")