To join n00b, really all you've got to do is sign up on the Forum and create a topic in the Membership Requests Forum following the guidelines outlined in the stickies.

Register on the Forums @ http://n00bfest.com/phpBB3/ucp.php?mode=register

Sign up for n00b in the Membership Requests Forum

If you feel these steps are too complicated and need further information on the subject, see Angry Kitten's Retard Friendly Guide to Joining [n00b]!