Most young guys want a semi-automatic, thanks to TV and movies. Yes, they shoot faster. Most experienced shooters here have suggested a revolver (Ruger Single Six). That's because most guys grow up and realize:
A) There is really no need to shoot that fast - it just wastes ammo.
B) Automatics jam, they are finicky sometimes about what ammo they like. (I had a Ruger Mk.II that would only shoot CCI Blazers without problems.)
C) You can shoot any kind of ammo in a revolver (shorts, longs, and long rifles), and any brand. They don't jam.
D) They are easy to clean. ESPECIALLY a single action revolver like the Single Six.
Automatics can be a lot of fun. Just get a good one like a Ruger, or a Browning Buckmark. These have been the two most popular over the years and there is a lot of aftermarket stuff for them, especially cheap and easy to get extra magazines. They both come in a lot of different barrel lengths and configurations.
Believe it or not, the revolvers will usually cost more, but I think they are worth it.
Ruger use to make the SP101 in .22LR. It's a great plinking gun built on their 5 shot .357 frame. It's really a solid gun.
Smith & Wesson has the 617, and it's a fantastic firearm, but it is expensive. Worth every penny, but the price of two automatics.
The Ruger Bisley .22 is basically a Single Six with a longer grip (you can get all 3 fingers on it - even your pinkey), and a longer 6.5" barrel. Accurate and fun.
If you save up and get a good .22, it will last you your entire life and you will never get tired of shooting it. The Good Lord gave us .22s so we could all have fun shootin'. It's a great place to start . . . and finish for that matter!
Good luck. Let us know what you get.