Tweety's advice was probably best, but all through orientation, one of my classmates and I used to laugh, "Hey--remember when we thought nursing school was hard?" But, as others have noted, much less homework, and even when you're stupid, you still get paid (everyone is stupid at times.)
Coming out of orientation to practice on your own is also tough, and scary.
Try hard to find a workplace that nurtures newbies. A new nurse needs a lot of back-up. Always be ready to return the favor any chance you get. Even very experienced, super-sharp nurses need an extra pair of hands, from time to time, so if you're there when they need lifting help, they may be more accesssible when you have an IV you just can't get. Be as independent as you reasonably can, but ask lots of questions and don't be afraid to call for help.
As horrifying as it is to do all the stuff you're already doing in school without an instructor breathing down your neck, it's also great fun. You'll laugh, you'll cry, you'll fall in love...I love my stupid job!