Word of advice, if you're going to get a GTi or anything fast and you get your Dad to take out the insurance, and then you be a named driver (and using it the most), you'll be doing what's called as "fronting" and that is insurance invalidation.
In simple terms, you crash, insurance won't pay out.
If you can't afford to insure a faster car then don't, get something slower and just deal with it.