Would a R32 skyline GTR be a good car for a beginer teen driver like 18-20 year old to drive???

Umm no. Insurance will be through the roof. Will cost a small fortune to actually get the car. Then you'll likely wreck it anyway...Id start with a cheap car, like an old honda or chevy...but make sure its either FWD or AWD....you shouldnt start on a RWD car.