I also need more for about New York. Thanks! What should I practice for my exam?
You should be practicing "everything": steering, acceleration, braking, speed, clutch... etc. But if you ask what are the most important things, I can tell you Steering, and Acceleration.Make sure to steer smoothly whether you are driving straight ahead, turning or backing up, and moderate and smoothly acceleration are key!
If I want to change my license from one class to another (in the near future), would I need a Pre-Licensing Course certificate?
No. You don't need a PLCC, as long as you have a valid NY state driver license you can apply to change your class.