ha ha, are you serious ? (originator of this thread)
You went and put an order in for a mk6 GTI and you hadn't even checked insurance. Dear me.
What is it with young lads these days ? Why do they want the fastest cars so quickly ? No, silly question. I was exactly the same and would have loved a mk1 or mk2 GTI when I was 19, but why didn't I ? Yup, that's right because I couldn't afford the insurance never mind the car.
Unless you or your family are in a position wherby you are minted (and good luck to you if you or they are) then I'd cancel the order and start my driving career with a more sensible car and build up my own insurance no claims. It's not really hard to work it out is it.