You've done the first step. Recognizing that you have a problem and making a commitment to quitting.
My suggestion is to make a plan to stay that way. There are tons of resources on this forum that you can explore to learn more about your options. AA/12 Step, secular recovery programs, psychiatric intervention, cognitive group therapy, inpatient rehab, outpatient programs, psychotherapy. Plus we're here to help.
A sobriety plan is often the difference between success and relapse.
You cannot do this alone. That's the first thing I learned.