Welcome Hah! Like switchboard, I was drinking 24/7 in the end. I'm much older than you, and would give anything to be 21 again and start over - without the booze. I was determined to control it when I was your age, and it almost cost me my life. So be thankful you're seeing the light now. You'll never have to suffer the way many of us have.
You're learning to live again in a new way, so be patient with yourself. You'll grow to love the feeling of freedom and hope - no more getting numb. Congratulations on your decision!