Is My Niche Specific Enough?

Hi. I’m beginning coach certification in August and have decided that I can act now to start my business and use certification to become the best coach I can be. The niche I want to focus on is helping women who are also shift workers to lose weight and keep it off permanently. I have more than a decade of experience as a shift worker and know the excuses that are made and the story that we tell ourselves that being a shift worker makes weight loss more difficult. I’m passionate about helping this group of women. Is this niche specific enough? Thanks