Here is what will happen:
Best case scenario:
You get a skyline you do all the first stage mods, most of which will get you more attention from the cops, especially the P plates, you get done for unroadworthy and driving a high powered vechile, you then have to sell it at a loss and buy a cheap shitter.
Worst case scenario:
your showing of in front of you mates (dont even try to tell me it wont happen bbbbaaaaahhhh, i told you not to say it) and lose control, at best you hit something soft and just damage the car, at worst you kill someone, either way the cops turn up and you are either fined and lose your license or your sharing a cell with bubba (to prepare you for that go watch "bad boy bubby").
The way it should be done:
You buy a $2000 cheap to run shitter, you put all the money you would have spent in an account with a good interest rate, in 6 years time when your 21 you will have the 40k you plan to spend buying an r33gtst and modding it plus the compounded interest, should add up to about 50k maybe more, you then buy your self a R35 gtr which by that time the private imports will probably be 70-80k, badda bing badda boom you have a car worth spending money on.