Financing Questions Please Read If you CAn help...

Minsu

Im young 21. So i wouldnt say im oblivious to finance.
Now when buying a car im guessing you can either use ur own financing (no idea what that means) or use the dealers finance.
Now i dont have credit, no credit card for me as of yet never applied for one because if you get rejected you lose credit score?
Now if i give them 8-10k down on a new z 2012 (not 2013) and say i want to finance what would they say seeing that i have no credit?
Im at a loss, i thought i had a good handle on this but after some reading i got confused big time.
I really dont wanna regret buying a Z you kno? wanna buy and drive it to the ground and then rice the **** out of it.
I made alot of post about buying the Z and ill be ready by the end of the month
so i have a month to really learn about this whole financing thing.

Help me out retired car dealers, currently working dealers, and u smart dudes.