As Glyphstone said, running simple mortals is by far your best bet as a new ST. But if your players are insisting on either Changeling or Werewolf, and you want a combat-light game, Changeling probably works better for that. Werewolves do lots of combat, and that's really all they're good at. You can do combat-light, sure, but combat is their main means of interacting with everyone around them.

That said, while Changeling lends itself better to combat-light games, it's noticeably more complex then Werewolf. So be warned: before you go into the game, you really want to know how the game works. Read through the core books, both World of Darkness and Changeling: the Lost, first, and don't let players pull from other books for you first game.