Quitting your day-job, sitting in a co-op space, risking thousands of personal funds, building, and building, and building, and building, and then finally releasing something with no real idea of it's potential is an almost sure-fire way of failing, and risking your well being at the same time.
This "prove-everything-at-each-step" side hustle method is how most businesses should be started.
Take notes, well done.