reading all the posts here on computerforums daily is a great start, and just ask if you have any specific questions (maybe look at the sticky posts and google first to see if you can find the answer there).....read as much tech news as you can (PCWorld.com, CNET.com, ZDNet.com are some good sites for tech info)......have fun!
if you realy, realy, want to be a nerd, you must first of all be polite to other nerds like me lol. dont call me a nerd call me a geek, i prefer that lol.
anyways best way to learn about comps, is to stick around here and and listen to what the experienced guys and gals on here have to say. you will learn heaps by just staying around the forums.
woz
"When you call someone as a Nerd, you actually gave them a compliment, because Nerds are the people that make good money and you usually end up working for them." Great words by my favorite teacher.
umm u cant learn everything from a forum, but u can learn most of it =D. there are so many topics in computers such as building one, the mechanisms of computer hardwares, such and such. if u are really interested in computer u should check out howstuffworks.com. it has everything u need to kno about computers and they explain in understandable language.
btw, computer nerd doesnt mean u have to be a nerd, its just a terminology used for someone that knos alot about computers.