Need help with niche

I would like to nail down my niche. I want to coach professional women age 40-60 with prediabetes (or diabetes) who live in Tallahassee or the immediate area.. The problem is most do not even know they are prediabetic (or diabetic). Most do have a weight problem, belly fat, and are frustrated. How do I find them or they find me if they don’t know and don’t want to find out? Focus on what they are frustrated about? Not fitting into clothes-smart professional women, but can’t figure out what to do about their weight problem? Thanks for your help.