There are non-'higher power' based recovery groups out there. The only one I can think of right now is LifeRing. Unfortunately, a quick search on their site showed that there aren't any LifeRing meetings in Reno.
You don't have to be religious or believe in God or any "supreme being" for 12-step based programs to work. The second step reads, "Came to believe that a power greater than ourselves could restore us to sanity." For me, the power greater than myself is the AA/NA program/fellowship, and I know others who say the same thing. I draw strength from others at meetings, learn from their experience, strength and hope, and apply it to myself and my program. Prayer is something I still struggle with since I don't believe in 'God with a capital G,' but saying the prayers helps me collect my thoughts instead of sitting around being pissed off about something.
There are lots of clever little sayings in AA. One that I'm not a big fan of but you may hear or have heard is "Fake it 'til you make it," essentially meaning pretend that God exists until you start to believe it. One that I do strongly believe in, though, is "Keep coming back!" Try out some meetings a few more times, let them know that you're new and need some help, find a sponsor and talk to them about your concerns surrounding the higher power aspect of the program. It's scary at first, but things really can change for the better.