Hi. i was just wondering if anyone knows the quickest way to become an ob/gyn anesthesiologist. like, would it be better if i became a rn nurse or nurse anesthetist first?

A RN Nurse would be better and quicker and a good start. Many schools are forwarding that position and beginning to make classes about it, as the nurse job is the future. 

That's my opinion, take it from a Fire Fighter and soon to be EMT. 

Olfactory epithelium i believe