My atheist friend refers to The Universe as her higher power - it's more about not trying to control everything yourself and trusting that it will work out than it is about any particular kind or religious faith.
Ditto -- and I'm an atheist.
I haven't had to grapple with this because Al-Anon meetings in my area are so slim. I went to individual counseling for a LONG, long time. Once a week for three years? My therapist worked with me on cost so it came to about $25 a session. It was worth it because I was ready to change my life and clear out the old debris. I also read everything I can get my hands on about addiction and how people like me keep getting sucked into drama and stay there, i.e. codependency. This includes SR, which I check way too much while I'm at work.
It's a process. Just when you think you've got it under control, the ground shifts and you find out there's more ground to cover. But I like my life better now than I ever have. Just be open, be willing, and be engaged. That's all I know.