Mrs.Floppy,
Welcome to SR! My take on the 12 Steps is that it's a business plan for getting and staying sober. I guess my best understanding of a Higher Power is more of cosmos sort of thing. I do believe in a cause and effect action.
There are a Secular 12 Steps. You might like to check out the Secular Recovery section here at SR. You can be an atheist and work the Steps.
Have you checked out Rational Recovery? Or SMART?
Again, welcome!
Love,
Lenina