I was very similar but I started drinking alcohol in high school to help with social situations. Binge drinking has plagued me for my entire adult life and I have gone months without drinking and it got much better. My relationship with alcohol has evolved and my drinking has reached a point now that whenever I do drink, I black out. I can't control it, I can't moderate. I am lucky to be alive and not in jail. Sober Recovery is a great community and you will find countless stories similar to yours. Welcome and happy reading!
Something that may help with your anxiety is exercise. Working out really helps my social anxiety. It is very hard to exercise when you are hungover. Getting in strong, physical shape through running and weightlifting is hard but well worth it. Tomorrow I am hitting the gym for the first time in months.