Is this considered Expensive Health Insurance????

"I get yourself a vehicle in slightly and that I do not know things to get. I have some ideas like a Nissan 350z"I am converting 17 in a few months and 16 years old. I'm currently paying about $435 for  insurance  in a-6 month time. May that charge decrease once I convert 17"I've my driver's certificate but-don't possess a car. Do I must buy myself insurance basically need to get a buddyis auto