That's cool, I started programming when I was 12 too. Now I've got grandchildren older than you and I'm still learning how to program! I mean, I'm already quite good, but it's not something you ever finish, you just stop one day, usually by dying :)

Since you're focused on accomplishing tasks and seem to have a basic grasp of Perl, I would recommend The Perl Cookbook because it's a collection of solutions to common tasks that come up over and over again.