Primary?

So the 2nd counselor in our ward's Primary presidency was called to a Stake calling so there was a hole.  Today I filled that hole.  I feel so uneasy about it.  I've never been in a primary presidency and I feel like I really don't know much about Primary.  I've been in the nursery for a while now and that was pretty low key.  This is a much bigger commitment. :/  It will be nice to be in there with Kade and Clint though.