Firstly, buy something you can afford to pay 100% down for. in other words, don't finance. This way you don't need comp or collision. Buying a car straight up like that at 19 probably guarantees you'll be buying a car that's not worth comp or collision anyhow. If you own your car, and you just have liability at the lowest allowable limits, you'll save a LOT right there.
A four-door econobox would probably be your best bet.