Welcome aboard
I'm new having joined only a couple months ago. Had absoutely no knowledge of fine detailing, but had to learn quickly cuz we had just boughten 2 new cars and I wanted them to look reeeaaallllllly good. Happened upon this site by chance (actually spent all my time at a different site, then found this one more recently and now make this my #1 site to visit whenever I open my laptop).
Like Lowejackson said, get ahold of the Autopia book and start reading. But equally as important, if not more so, is to read (and read, and read!) the forums and do some searches. After you've gotten some comfort level, then start asking questions. The Autopian community is exceptionally nice and helpful, not to mention super duper smart.
