Audi S8+ as starter

Hello, I will be on 4.6 20 years old and have my driver’s license only for 3-4 days. I would like to buy or finance an Audi S8+. The financing of the vehicle is not a problem so far, however I would like to ask if the insurance is 3 times the monthly rate or similar ?? I don’t know much about insurance, only knows that my father pays for his GLE quarterly ~600€. He thinks if I would also get insurance on his car, w Is this true or is that just half-know what your father says there? If someone is well versed in insurance, I would be happy if he could help me so far. TL;DR Audi S8+ as a novice driver – what about the insurance? As a novice driver on a GLE 350d with insure – really 2000-300€ more expensive ?