Second interview/shadow experience Friday!

I haven't posted a whole lot, as I've been searching through the old posts and getting the lay of the land. I'm a new grad as of January and passed NCLEX RN in March.

I had an interview last week with HR in a hospital in which I did two clinical rotations. I had great experiences in my clinicals there, and this hospital has always been my first choice. The position is offered as part of a grad residency program on a step down unit. I'm thrilled at the prospect of working on this unit and for this manager in general, as she has an excellent reputation as a mentor.

I am comfortable in interviews (I'm almost 40 and I have much experience and thus confidence interviewing for a new position) but I have never had a shadow experience tied to a job before, as this will be my first nursing position. I would like to prepare as best I can for this experience. I have several questions prepared for the NM and have reviewed as best I can the different diagnoses/pathophysiology for the population this unit cares for. I will have my scrubs clean and pressed and ready to go that morning. How else should I prepare for this opportunity and what can I expect? Is it typical for a residency program to offer a shadow opportunity or should I be cautiously optimistic?

I have to say, I was a little excited that HR handed me information regarding pre-employment testing and insurance at my last interview, but I also realize that with the pool of applicants this residency receives, it may simply be a protocol. Any words of wisdom are welcomed.