PLEASE PLEASE HELP! pleasee?

So last night i walked to a party. We drank. And then we just chilled. Someone yelled cops and we ran. Eventually me and my friend got caught. They handcuffed my for like 5minutes and then took them off. They did the breathalyzer and i came up with 0.7. It was my first time drinking. I was soo scared. They called my mom and she picked me up. They said i would just get a underaged drinking fine and i had to go to court for it. The cop said it would be just community service and id have to wait 6months to get my permit as a punishment. But i just read an article on us and it said we would be charged for three things. (possesion, underaged, and being drunk in public) and that punishments would take away my liscense, get fined, get it on my permanent record, explusion (though it was the first day of summer) and i think something else. I have court in august. And i am terrified. What would be my actuall punishment? What would i do at court? How many beers would a 0.7 be? PLEASE HELP AS MUCH AS YOU CAN