What would the sentence most likely be for this crime?

I was struck by someone with a car after an argument. The kid was my cousin, he has been beating his mother and sister for some time now, and he recently hit my mother. So one night it was his birthday and me and my cousins went out for his birthday after he apologized for what he's been doing and saying that he would change his ways. When we got home he was about to get into his car drunk and drive so his sister stops him and tells him not to as he was putting open bottles in his car from the house. He then was about to hit her and i got involved and he jumped into his car backed up and struck my car first, then backed up again and struck me and his sister with the car. He ended up getting DUI, 2nd degree ault, reckless endangerment, following too closely, and like bad start or something and leaving the scene. He just turned 18 that day, what do you think the outcome of this will be in NYS?