I have very little personal brand (I went from writing about React to around 900 subscribers to running an uptime monitoring SaaS - https://onlineornot.com), but am still managing to grow in a red-ocean market.
The trick is:
- being default-alive (the business will never go under, as I have a full time job)
- continuous progress (2 hours a day, every workday)
- learn everything you can about sales and marketing, the engineering is the easy part :)