I work in a similar setting (plastics clinic/OR, but we also do non-cosmetic stuff).
Just like with any other job, proceed with caution. This is a hard job, and nursing school didn't really prepare you for it. You were not taught how to do cosmetic assessments in nursing school. Use the other nurses as resources, and get good at this. You will also have to learn to be a salesman. After getting good at assessment, find someone who does sales for a living, and get some lessons. You may be writing clinic notes (all the clinic nurses I know do). Practice, and have others read over your notes.
In the OR: Learn to scrub first. Learn the instruments, learn the procedures. Then circulate the cases. If cases are done under conscious sedation, get ACLS certified and take a course in conscious sedation. If you try to master the OR in a different order, it will be much more daunting. (BTW, not sure about the CRNA comment above
but clinic/perioperative nursing is not critical care...) Buy a book on AORN standards, and make sure you know the legalities of the OR. You are the only one who is going to be able to protect your license.
Feel free to PM me if you have any questions.