If you are a lightweight, ie under 75kg go for a high aspect fast kite such as an F-One Mach1, Airush Lift, Naish X2 or Wipika AB.
If you are heavier than 75kg you may find a more powerful kite better such as the North Rhino, Slingshot Fuel or Naish Aero.
The above is assuming that you want one kite that will give you a big range of usage.
However the best kite for you is in reality one that feels right for you and the majority of conditions you kite in. To find this kite you've just gotta go out and try them. There is no better way. Go to a demo day, find a dealer with demo kites or get lessons on a variety of kites.
Most of all start kiting asap!! Every moment not spent kiting when you coulda been will prey on your mind in the future
Have fun Dave