The hardest thing for me when I made the same move was losing the ability to look at a pt, and know by "Gestalt" impression whether they were "ok". All that adult stuff you learned in nursing school has to be unglued, and new "norms" installed. You CAN DO IT, but be patient w/yourself.
On the other hand, you will have skills that some of the NICU nurses don't have, and you know monitoring and stuff like that.
I would suggest you start doing your homework--buy a Merenstein and Gardner, Neonatal Intensive Care, a brand new edition is available on amazon
. Also get a Neofax--it's a drug reference book, and will prove useful. A neonatal stethescope helps, don't try to get by w/an adult one. You don't HAVE to get a Littman--the less expensive stethescopes work fine. Also, review stuff on breastfeeding--usually, you start off in the convalescing area, and that's a really big issue.
Remember that, just as babies are immature people (and that affects how they deal w/drugs, infections, and other stuff), premies are immature babies. Every body system is not ready to be out of the uterus, and everything that goes wrong is usually reflective of that fact. Most of the problems will be outgrown, but not all, esp the neurological problems.
Parents are grieving for the baby they did not have, and are very fragile.
You will be welcomed, I hope, and learn an incredible amount. I wish you the best of luck. Where else can you work where on some days, you can hold and rock a baby, and et paid a lot of $$ for it? Also, the messes are a lot smaller!!