I also first started at the guides to harmless hacking http://www.happyhacker.org
This teaches u alot of cool things it's like the easiest place to aquire knowledge about the world that you want to learn.And then when you have resonable questions you can e-mail the people there and they will usually reply.

Read alot of books about your operating system, common operating systems, commands, vulnerablily's, learn ms=dos and unix commands.Learn some phreaking go to computer conventions, It's mostly reading alot of network security books like Hack Attack's Revealed,Just go to like B&S or supercrown and look in the networking section.