You must have experience of driving PROPERLY!!! You need to obey the laws! And perfect your driving skills. It's not that hard. Just learn the rules and get atleast 20+ hours of proper driving to get used to how things go. :) be safe and never put yourself or others at risk. Remember that instructor is scared for his/her life because some random new driver is going to be driving her around. You need to master the "smooth and safe" ride.
It's only as hard as you make it out to be. Millions have passed it before you so how hard can it really be then. Just focus on the test when you take it and you'll be just fine and everyone is scared when they take it so its only natural if you are a little scared but believe in yourself and you'll be just fine here. Good luck and Happy New Year