I think I need a map...

I've been tapped to take on the organization of the worship at our church - unfortunately, this is something that hasn't had anyone really functioning in it for a handful of years, they've just been sort of going along like a patchwork quilt more than with an organized effort. So I go "Okay...but what exactly am I doing again?" to which I get "Oh good, you have no predisposed notions!" - say what? I feel like I am looking at an amorphous blob that's been handed to me, with everyone expecting it to turn into something wonderful. I have no hesitation now about taking it on (I really do think I am supposed to) but.... Um.... Now what?

It is a bit frightening to have everyone's undefined expectations floating (however gently) towards me.