Similar situation, hired as new nurse into PACU. Thankfully I had a very structured orientation program that lasted > 4 months. That said, if I was to look on my own, it would have been critical care resources.
I was a new grad straight into PACU. My orientation was 6 months. I've been there 3 years now and the best advise I can give is to observe well and ask lots of questions. Don't be embarrassed I have learned so much from our anesthesiologist and CRNAs.