Don't be afraid to ask questions, even dumb ones. Sometimes asking a simple question can teach you a lot.
Don't expect to feel expert any time soon. There's a lot to learn and it takes time. I've been here almost a year and I don't think there's a shift where I don't learn something.
Find some unofficial mentors. I have several experienced nurses I ask for help. They don't mind and it really helps me learn.
Get involved with the unit, offer to help with the annual Christmas party, that kind of stuff. You'll meet a lot of friends that way.
Have fun

. The NICU is a great place to work.