Is My Niche Holding Back My Sales

I am a life coach that works with Musicians. I am working through my thoughts that Musicians are very skeptical and have no money to pay for coaching. At the same time whenever I put out a podcast or anything surrounding money it gets a lot more attention than one that focuses on changing your thoughts or managing your brain. I have moved from one-on-one coaching to group coaching 6 months ago and I’m struggling to sell the group coaching program. I currently have 11 members. I need help communicating my niche and narrowing down one sentence that says what I do that will resonate with Musicians