Welcome back. Many of us have gotten sober with AA and many of us, like me, got sober without AA. There are lots of good books with ways of thinking about alcohol and good ideas with solutions - Alan Carr and Rational Recovery are the two that I used most. This site, plus those two, add in finally finally finally wanting to give myself the chance to live the life I deserved and my family deserved, include exercise and therapy and viola - I'm in my 3rd year of sobriety.
Without going into the whys as to why we drank etc, exploring the whys in terms of why we want to quit, what we would be most excited and inspired by if we gave our selves sobriety - that kind of re-calibration, can be very helpful.
Whatever you do, focus on the flame inside of you that continues to want sobriety, that drove you back here looking for help. Nourish and respect that flame, that desire for a better life. It can and will grow and will sustain you through the challenges ahead.