The instructors like you to show how competent a driver you are, so if you can hand brake it around a few corners, maybe some slight drift action, they will be very impressed.
Lighten up the mood in the car a bit by pumping some loud music then hitting your brakes in time to it.
seriously though just relax and drive responsibly and it'll be all good. If you've been driving a little bit you'll be fine (i've seen some terrible drivers passing their tests),