Welcome, WT, and well done you! You've figured out the key -- "don't put alcohol in my mouth"-- that works 100%
I understand struggling with guilt and regret .. i had some of that too. Mostly for me this heals over time, as i commit myself to not making the same mistakes -- not drinking, and also trying to be kind and considerste to myself and others. Some folks also benefit from counseling to work through some of those feelings -- have you considered that option at all? You deserve to forgive yourself.
Congratulations on quitting and making possible a much better life!