Here’s the thing. Self-publishing, in many ways, just allows us to accelerate the career path of the author. Even in traditional publishing, it usually takes about three books to gain traction. In traditional publishing, this takes three years because we are dealing with a publisher’s schedule.
In self-publishing, we can make our own schedule, but it still takes THREE BOOKS MINIMUM. I know there are exceptions, but most self-published successes hit at about book three. The ability to offer multiple titles is a huge part of why John Locke became successful.