Niche Narrowing

Hi! I’m starting a new business. Is this niche narrow enough? I used the worksheet to help.
1. category: relationship with things in one’s home
2. two submarkets: minimalism for shopaholics
3. google search: how to become a minimalist + how to stop impulse buying
4. solution to their problem: how to curate what you have and shop with skill instead of impulse

What do you think?
Thank you so much!