How do I change my expertise?

I want to know, how do I change my expertise, without becoming an expert? Right now my expertise says camcorders. I didn't become an expert though, because I'd probably get in trouble with my mom. I want to change it to: cameras and ipods. I don't know anything about camcorders. I don't even know if I'm spelling the word right? I know you'll probably say just go to edit profile. I have, but you have to become an expert to change it. Is there another way to change it without becoming an expert. All I want to do is help people, because it makes me feel good inside. I feel silly and stupid, having 152 solutions that say I'm good with camcorders, under the camera and ipod problems.

Pleae help me.