When starting a company it is ideal to monopolize a small market initially. For example, Facebook started with Harvard, PayPal started with power sellers on eBay, Tesla started with high end electric sports cars, etc. After you’ve acquired a good percentage of market share in the small market look to expand that market.
What allowed me to change and prosper was the freedom to grow apart and lose touch with people. It’s hard to change yourself if you’re stuck in the same social orbit. There’s a gravitational force that pulls you into repeating the same circular pattern over and over again. Breaking out of that takes tremendous force.