Congrats. Baby scrubs are awesome.

Every day or so would be good. I offer food on day 2 and every day after that, while other wait a week or two before they offer. I've had babies start eating on day two and others that waited a week or two.
It's just my opinion but I believe there is a short window of opportunity to get some babies to eat. I don't want to miss any windows, so I offer early.