Never underestimate the power of networking.
It's an incredible impact to have on others' lives and your own when you reach out and offer your services and ask how you can promote them.
Step One: Ask yourself, how are you connected already? What groups of people are you in touch with? Does your business idea benefit them in some way? Let them know you are interested in helping them, and you may find they reciprocate. Regardless, you will get a headstart on your business you would not have had if it stewed in private on a web page.
Step Two: Look for local Chambers of Commerce. Attend their free events and judge whether a yearly membership would help you.
Step Three: Look for conferences. Put them in your budget. As an entrepreneur, it will be YOUR responsibility to seek out training; no one will tell you where to go or when! This is different from Sergeants' Time, where everyone in the unit had to attend weekly.
Step Four: Look for events. Try Google search, or Facebook search by location or topic. For example, MilBlogging is a great conference to attend. Get connected quickly, in person, with others with similar goals. https://milblogging.com/