You should probably do some more thinking on whether you are responsible enough to get a gun. Stating that you don't want to go to a shooting range "or something like that" is scary.
1)How do you intend to defend yourself without practice? You don't just pick up a gun and "abra cadabra" you're putting 2in clusters in a target!
2)If your apartment complex is getting robbed, and you only need to be accurate at 5 yards, what happens if you miss and kill someone else. Are you prepared to spend the rest of your life in jail?
3)Cheap gun? A gun is something that is protecting your life. Would you go get open heart surgery from a "cheap surgeon?" No, of course not. I'm not saying you have to get the Bentley of guns, but get something reliable.
I'm really not trying to be rude, however, I'm just not sure that you are mature enough for a gun yet.