Not many people seem to like this site
Happyhacker.org but it's a good starting point.I started port scanning working out what services ran on what ports.
It's also worth networking two computers together so you can try things out in a LEGAL way and this gives you the option of trying out different operating systems etc and if you have any like minded friends get them to try and hack your network.
O'REILLY publish great series of computer books called in a Nutshell which are worth reading. They cover alot of the main area's of computing. Also check out the Hacking Exposed books. My favourite book and the cheapest is A Complete Hacker's Handbook by Dr -k and its a bargin for £6.99.
I have never been but there are hacker meetings i think on the first Friday of every month around the world which sounds like you can gain a good wealth of infomation.
2600 MeetingsIt's also well worth starting to teach yourself a programming language from the start.
Good Luck