My niche

I wanted to get your advice regarding my niche. I’ve decided that I want to work primarily with impostor syndrome.
So I’ve come up with a description – I help successful women to stop feeling like a fraud and finally enjoy their life, own their accomplishments and stop sabotaging their success.

I have two questions in regards to this:
1. Is this niche compelling enough? Is this something that would sell? It is a fact many women struggle with feeling like a fraud but is this something they would pay to get rid off, or do I need to access these women through a different angle and then also work on their impostor syndrome.
2. Do I need to narrow the niche even more? I have a law degree myself, so should I narrow it down to female lawyers for example? I help female lawyers to stop feeling like a fraud?

Many thanks in advance for all your help.