If you successfully started a company or figured out the secret to motivating millennials, people will be willing to pay for your secrets. By developing your story in a compelling way, you could land paid speaking gigs. To find audiences who will listen, consider who might find value in what you have to say. Who needs it most?
Once you have that answer, research where those people gather. What associations are they members of? Which conferences do they attend? Reach out via email to several local chapters of relevant associations, and offer your topic and speaking services. You may start out speaking for lower fees, but as you get more experience and bookings, you can command higher rates.