Welcome to the sport my friend.
I might be in the minority for this, but if you do want to get into centrefire (.22 can get a little boring sometimes, heh), I'd recommend a Tokarev TT33. They're very cheap here in Canada (about $225-275), the surplus ammo for it is quite affordable, and it will teach you to clean and take care of your pistols, as it's absolutely necessary to clean after using surplus ammo. Everyone has their own method of cleaning too but there are great resources online.
Let us know if you have any other questions!