As an agent for 20 years, I have represented several life coaches. much of the 'niche' you create is based on your own personal life experience. for example, i worked with someone who started off teaching young men to have confidence. later he realized that what he had learned from all those coaching sessions is that he really understood how men worked. so he transitioned his coaching towards women and how they could improve their dating skills, because he had so much insight on the male human psyche. hope that helps, happy to discuss further. good luck.