I can't completely agree with the previous post. I've been a Medical Assistant for 6 years and am in my first semester of a nursing program. I do think that being a Medical Assistant gives you in advantage in vital signs, phlebotomy, EKG's/ECG's, and also the comfortability of being around patients.
However, when it comes to critical thinking (Which is how we are taught and tested in the program as well as for licensing) - That is something we all learn when we get into the nursing program. It's a completely new way of thinking. Also, most Medical Assistant programs teach you "how" not the "why" of things. Which is probably what they were talking about when they meant you wouldn't have an advantage. When I was working as an MA I knew why and how to do BP, labs, so on - But, it wasn't in-depth knowledge, it was more on a basic-mid level. A&P courses for MA's are very basic, and labs for them aren't required either. I didn't know how drugs could interact with other drugs or how everything in the body exactly intricately worked with another - Until I began taking the college level pre-reqs and co-reqs. Maybe that's what they meant?
Either way, with everything you have to work for it. All of us get nervous, worry about clinicals, exams, and stress out the same, and we have MA's, CNA's, Psych-grads, and others with experience in our group. Never get comfortable! And never feel like you're sure about something. Everyone is taught from the ground up. All our preconceived notions and former way of doing things go out the window once we're accepted into the program. Everything is by the book once you're in the program. You will have to do everything from then on the way it's taught. And in that aspect, no one has an advantage.
I tried to give you info. based on my own experience as an MA, and then getting into the program. Everyone's experience is different. I hope this has somehow helped. Good luck and don't give up!!!