My guess is there is a lot more community acting opportunity than you think. I live in a very small town surrounded by small towns, and there are several community theaters around. The trick is how to find them...
Have you done a search online for community theaters in your area? You may need to be able to drive a half-hour or 45 minutes away to expand your opportunities.
Check your local papers for ads for upcoming auditions. They are often listed in the community events page. Always check community bulletin boards for flyers. At first, you may need to go see a show that is being produced so you can meet someone there who could put your name on an email list to get notifications about upcoming auditions/productions.
If you know any actors, ask them where they audition and how they find out about upcoming auditions.
Once you find a group, be flexible. Go to your audition, but if you don't get the part you want, stay open to being in an "ensemble" or working as part of the stage crew. This way, you will meet people and be part of the team. They may not have needed your acting skills for the last show, but they will know who you are and you may have a better chance of getting a part the next time around. Community theater groups always have need of good help.