how deep r your pockets :0lol, go to a pay day pen up pod mate or just learn like i did and allot of others, on the road either way if your avin it ul prob ding your car so start with a cheap car
Just go santa pod skid pens.
Or for ultimate open space, maybe bruntingthorpe proving ground. Its massive so you can just learn the balance points of your car and get to grips with it.
I used to have a dinner time play in my mx5 when I was working for a company on that site.