Since your a first time rider with NO experience, suggest you take the
MSF Course. You HAVE to take it if your under 21.
Now the NinjaZR9 is a 900cc Bike... its a super sport, its fast, really fast. I dont know if you want to be in that one. Also look into insurance (shop around before you buy the bike), you will see that you will be paying close to atleast 2000K/yr for that bike. I know you have heard bikes are cheap to insure, yes they are but not when you have zero experience on a super sport.
I suggest you tone down the choice of a ZR9X and go something like the Ninja 500R. Its smaller and still got the looks and the power.
In the mean time if you dont believe me post your questions on
www.motorcycle-usa.com
TGG