CC - I hear what you are saying, loud and clear.
Your words and feelings expressed indicate to me that the 2-4 drink / once per week goal will be hard to achieve. What starts out as best intentions, a couple of pints with the boys over wings, turns into 4 more the "biggie" sized brews and an unsafe trip home.....followed up by spending the day in bed wish you were dead.
With that said, I have scene posts here where people were able to revert to a life that included social drinking.
Rather than freting over not being able to drink for such a loooooong time, being that you are still you, focus on the fact that you are young and a sober life is 100% more productive, healthy, clear and fun!