How do I go about buying a new car?

I just turned 18 in september and I have a 2003 Chevrolet Impala that i got back in June that I'm still paying for and it is under my dad's name and he doesn't have good credit but we bought my car threw Pro Car Auto Group that goes threw some financial company that works with all credit types and this is his second car threw the same company. Well i would like to get a new car and I was wanting some opinions on how i should go about getting a new car?

Check out some of the auto sites like vehix.com, autos.com and cars.com. A lot of people and dealers sell through those sites. They also offer the VIN and you can check up on the car history.