I honestly would count your blessings. it's only your first and never do it again. You will be okay. I got a DUI 13 years ago and it was my first and only one. My home state is very hard on DUIs. It cost me probably 5K in lawyer and fines. 2 years of misdemeanor probation and it was wiped from my record...
You'll get through this. Keep your head up. I know the fear you are feeling...