Where do you fit in the world? Because you have to fit somewhere. That’s the big question when it comes to finding an audience for things people don’t know they want to know.
To do this, find groups, cliques, spheres, whatever you want to call it, with a broader interest in your subject. Then, find the commonalities (the relevance) between the two by broadening your subject area, link the two, then introduce your area. Simple in theory, hard in practice.