Not sure what your actual position in the OR will be but here is my view as a new graduate in the OR....
I have been in the OR as a Registered Nurse training to be a circulatory nurse for about a month. I think one of the first things to really understand is aspetic technique and the sterile field. Make sure you ask how to open items sterilely to the field because you will probably be helping "opening a case" and not necessarily do they remember you are new. Also if you are able to prepare yourself to what cases you will be in the next day do so, then you can at least look up the procedure and have idea of what they are doing and what complications there could be and sometimes figure out type of positioning will be used. So far for me, the surgical techs are very very information about sterile technique, how to open things, and what is going on. they also tend to have a little extra time then others at times. Always remember patient safety and it AlWAYS comes first. So after assessment before a case of the patient, the patient comes in and make them comfortable and safety belt them to the bed then help anestesiologist by hooking up patient to all monitors and helping anestesiologiest have items handed to them when needed for the intubation if needed, once the patient is asleep you are positioning and prepping the patient to the doctors request. Then its all about what the scrub team needs as a circulator until the patient is awaken and moved to PACU. When you have free time look at products and find out where things are located. I have also discovered anestesiologist typically really want to educate you, so you understand what they are doing and what they need from you. Do NOT be scared to ask questions.
Remember it will be very overwhelming at first and complete information overload. I have so much to learn in the next 7-11 months of my training, but I try to learn about as much as I can daily. And do not be offended or take anything personal when you are corrected and/or yelled out by fellow employees or if a doctor is going crazy over something.
A couple of good things to look at or books to read....
Perioperative Standards and Recommended Practices - (the bible of the OR)
Pocket Guide to the Operating Room
magazine - OR Nursing
I also have been trying to find a surgical tech willing to loan me some of their books to look at. I hear they have lots of helpful information.
Hope this helps a little. Its been pretty crazy for me. Kind of reminds me of nursing school
because so much information is being thrown at you all at once.