Check the phone book. If there isn't one in your community, get involved and try to organize one. You don't have to be an athlete to learn how to defend yourself. A good program is designed to adapt to every age and ability and provides each student with the opportunity to learn. Each individual is unique and students should be able to discuss their own needs.
Some programs have specialized classes for specific groups.
The instructor respects and responds to your fears and concerns. Instruction is based on the belief that we can act competently, decisively, and take action for our own protection. Essentially, a good course is based on intelligence and not muscle. It offers tools for enabling a person to connect with her own strength and power. These courses are out there.