working for a church

sometimes it's hard working for a small church. there's exactly 4 people on salary (not including the maintenance guy and the lady who comes in once a week to write the checks!-for those wondering, that would be me, the DRE, the office manager, and the priest.) so I have to do a lot of figuring out stuff myself.
I'm just a little stressed/worried. I have to figure out my hours and how everything will work, like, make sure my hours will balance out between the business of Christmas and Easter, and the slowness of summer.
how am I really supposed to do that when I don't know exactly what I'll be able to do in the fall with things like a children's choir? Bringing in outside scholas for an occasional Mass or two?
I'm not complaining, I'm just pointing out how, well, in a bigger church wouldn't someone be telling me how I would spend my time? Maybe not, but I am definitely not a "visionary." by that, I mean how like I'm not going to be very good at finding stuff to do for 20 hours a week with just music. but that's part of my job description! (something about "expanding and improving the music program...) I mean, the choir loft and music library need to be cleaned out SO much, and I can always practice more (prepare a prelude, etc,) but I'm just worried about how to...quantify? all of that... and my lack of ideas for more things to do, or at least how to implement them...