First, talk to your parents and let then know about this if you haven't already. This is a criminal offense in VA, though likely the conviction would not follow you as an adult. Virginia has a 'first offender' law that makes the penalty less harsh if this is your first criminal offense.
Most get 50 hours community service and have to do the 8 hour alcohol course which you have to pay for (appx $ 220) under the first offender status. Driver's license loss is not usually done for first offense.
Always refuse a field breathalyzer test, you are not required to take it. You will have to take one at the station, however, if detained.
An attorney will cost you appx $ 750. Always a good idea when up against a criminal offense in my opinion.

