Your past experience will certainly bring lots to the table. Of course, the OR is different than any other dept. And, it sounds like you have a good orientation program set up...learning to scrub will be invaluable.
Any questions you have, just ask your preceptor. There is so much to learn and the technology is changing from specialty to specialty and practically overnight.
Just remember surgeons are a 'breed of their own' (IMO). And, don't get too overwhelmed...I promise, it will come together for you.
I think I have seen your posts on the delphi board (former traveler). You may want to check out a BB for periop nurses at:
and/or membertalk on the www.aorn.org
board. I cannot recall, but you may have to be a member of AORN to sign up on that BB.
Best wishes in you new field.