Yeah, don't worry, Rice. I was very nervous to start building this thing on my own, but Joe's kit is so well made that it's pretty hard to mess up. The little guide that's included in the .zip file with the plans is helpful enough. I also use other people's threads as references to make sure I'm progressing well. Trust me, I was completely new (still am) to anything that involves tools when I started.
Make sure you research the mods that have been added on. A lot of them make the machine much more solid (like the threaded rods fed through above the X table to make the Y assembly more rigid... or the iron angles on Y assembly sides). Also if you have the money (and it's not that expensive), get the dumpstercnc stuff for Joe's '06. It will make your life easier and your machine better.
One tip I can give you that no one else mentioned to me is that you should not attach the bottom or the top of the main X table up until the very end. Otherwise you will have hard time attaching the back and the front plates to it.... that's what I'm trying to figure out right now. It's a bit of a delema to feed through those threaded rods when you can barrely see them. Thank god there are openings on either side so I can kind of see them, but it's still tough.
-BK
