Welcome to the signup page. How does this work? You create a account and wait untill an officer approves you for raiding. Once you are approved you can create a character (My account->Characters option in the menu) and sign that character to raids in the big calendar view. Have fun!

Beware: If on a single night there is more then one raid you are expected to sign up to all of the raids. It is basically a way for officers to make different lists for different instances, but those raids will not run at the same time so you should be available for all on that night.