Great decision, and job on 4, keep going!
When I found SR I saw mention of AVRT and RR , got a hold of and read their material and it really resonated with me. There's a lot of information about it here on SR in the Secular Connections forum.
Try saying to yourself "I will never drink again, and I will not change my mind" and then listen. Whatever negative thoughts that come to bare on that statement are the 'things' you need to build an immunity from. The AV(addictive voice) in AVRT, that part of your thinking that sees a relapse or return to drinking as either inconsequential or inevitable or both. Build an immunity against that thinking, starve it out by not relenting to it and feeding it more fuel. You can do it, wish you well