I was wondering if someone could tell me how hard it is to get there N and what advice I should have before taking the test because I am really nervous!!

In the U.S. most states offer Learner Permits, but I think you are referring to getting your first American Driver License. This site has a great primer on preparing for a road test. The written exam is pretty easy, just read and study the test guide provided by the DMV in the state you will be applying.

(Your question was posted in the U.S. however, if you are referring to a Canadian Novice License, there is more information here, and an approved Driving Course is highly suggested in either country).