It's okay. Don't sweat the other guys telling you that you're too young to drive a new car. I've learned to drive and also been driving my dad's 1998 Lincoln Navigator until I got my Accord. And this was back in the day when the Navigator was new and nobody had one. Pulling up to gas stations and having people say "hey...nice car" feels pretty damn good, especially when you're 16 rolling a new Nav with chrome rims on it (the only problem is that i'm asian).

In between the Navigator and Accord, I drove a beater (1993 Ford Tempo, 86 hp, 3-speed automatic) for 3-4 months before I got (my parents got) my Accords. I was barely 16 when I got my sedan and then they bought a coupe three weeks later.

Anyway, $5000 seems a little too much. Look for a couple more quotes or shop around for the parts individually yourself. You can save yourself at least a grand IMO.