Boyd set you right on baptism and the Holy Spirit. The Spirit will help you a lot, but it may help to talk to others who have been through what you've experienced. Just like in most churches, we can't find folks to talk about being naked. That's whay some of us come here.
So, you likely won't find that many in your church congregation who can talk to you about alcoholism and abuse. One place for alcoholics is AA.
One of greatest members at our church in Whippany, NJ was an alcoholic who'd stopped. He was largely instrumental in getting my wife to come to the church from being at camps where Eddie worked.
One of the worst mass murderers of all time was one of our most prolific Bible writers: the apostle Paul. People change and can be changed by God.