I'm really scared now. I hit someone with my car and ran away. What if you're scared now?

If you hit someone with your car, call the police immediately. Because there is insurance, there is no need to be afraid of compensation. But it's different when you run away. The problem is different. This is very passive. So turn yourself in immediately and call the police. Strive for leniency, never run, running is a hit-and-run and this is serious.