Wendy, sometimes the best place to start is the place that gives you traffic: start part-time at a gym. Corporate gyms want you out on the floor, talking to people, building relationships, and earning people’s trust. When someone sees that you’re knowledgeable, they will agree to pay for your services.
Your best bet is to talk to lots of people and build relationships. Be confident about your knowledge. Make them want to learn more from you.