Get Lost in a Niche
I will say it again: it is a bad idea to cast a wide net as an early stage entrepreneur! Most founders know this and yet struggle to hone in on a specific market and target customers.
I totally get the attractiveness of going broad, to say let me do something for everybody. I know because I have fallen prey to the same temptation.
When starting out, I have a bunch of untested hypotheses and I don't want to leave any potential customers out. The mind makes me think that by focusing too narrow I am shrinking my market opportunity.
In fact, the opposite is true!
You have a higher chance of attracting a higher percentage of people from your target market when you build products specifically for them (vs a product designed for a broader market but it doesn't really fit anyone's specific needs).
Your job is to make a product so valuable for that specific market that everyone wants in and in most cases that is a big enough market to validate your idea.
When you can prove success in a niche market, you have a higher chance of succeeding in other markets.
You can always go broad later, when you have the product-market fit, when you have a loyal customer base, when you have backing of investors.
So in the beginning, get lost in a niche.