This might sound stupid, but to be quite honest I'd just wing it and see how you go. there really is no way to know where you'll be at by then, you know? Express if you want to - do you do well with expressing?
With CC, are you able to go along with her for a while to give her a chance to settle in (and reassure yourself about the place) before you actually start work? As for sleep - you'll be amazed, truly. She'll most likely sleep at daycare without feeds...