I'm going to jump on the .22LR band wagon also. They're fun and cheap to shoot. A Ruger 10/22 rifle, or Ruger Mark III pistol would be my recommendations. Both great, high quality guns. If you're just looking to have fun and punch holes in paper, you can't beat .22. If you're looking for another application, (Self Defense, home defense, hunting, etc) then there are other things I'd suggest. But since that doesn't seem to be the case (yet) .22LR is the way to go.
EDIT: Silly me for not reading the whole thread. Congrats on your purchase! That's a fine firearm, and if (really, when) you decide you want something for SD or HD, you're already set.