you're only 14 and you have driving license? Hmm... i might suggest you can buy any car you want , but don't get into races at first , that's the most important thing... (i know what you'll think , some old guy tells you something and thinks he's the shi* , but trust nobody has expierience at this age , and i know what every new driver thinks - "I OWN THE ROAD"

)
My suggestion is not to buy civic or something like that , but buy a big car , maybe an E32 7-series or an E34 5-series with 6-cyl , like 525 or 535...
Anyway 14 is the lowest age to have license i have heard of... is it a full-international license or there are grades?