Just go to our homepage.
Groups -> Black Twilight
Once you click to apply, scroll down the homepage to where you see "In order to join Black Twilight, you must submit an application to both the Priest and Priestess with the following information:", copy that form (including the number questions), click the Priest's name higher up on the page, click email, paste that form into an email, fill it out, send it, and by completing that you've completed the application process. :)
If you have anymore questions, just ask the Priest or myself, and we'll be happy to help.