As a P plater you want something that:
- Is cheap to insure
- Handles and stops better than it goes
- Gets the girls/guys
An N/A Skyline will struggle with the first and second points, third point YMMV. Unless you get an R31, then you'll be pimping.
Put some 285/30/18 tyres on. Don't be beech.
*edit* I just ran your numbers against my wheel specs, tyres will pretty much sit in the same spot.
You'll be fine
Intima SS, HPX, Winmax W3 (or whichever is the street version) will all be fine.
I orderd Intima SS and got sent SR. I'm happy with it, it works better cold than I expected (A1RM in my GT-R so can sort of compare them two once the SR is bedded in)