So long story short, I got myself in over my head, by agreeing to ST a nWOD game. It seems like this system is a bit more complicated than expected. I can't seem to figure out which books are necessary. Right now, my group is deciding between Werewolf, Vampire, and Mage. Which of these is easiest for group play? Also, where can I buy these books? The WW website returns errors. What supplements are important to each main book? Help?