Atheist here as well. I have never used AA, but I have certainly rebelled against the concept of God many times. Until I read up on awareness and decided that this was really resentment on my part and impacted my recovery.
Alcohol is a mighty foe and we must use all the tools at our disposal. AA stepwork seems like a great methodology, try it and see if it works for you. If references to God or a Higher Power get you riled up, either just take a deep breath and let it go or, if so inclined, ponder what it is inside of you that gets triggered by such notions. It is not the external stimulus, it is how you react internally that causes you stress. Change how you perceive it and boom, you’re free.