Yay! I've had a student license for 6 months now. It basically means I can't drive after 10 or have more than one friend in the car. now I could go to Taco Bell at 2 AM if I feel like it.
For the most part, in the US the age is 16. Some states, like mine, have restricted licenses until 17 or 18. Which basically has times when you can't drive.