A snowball starts embarrassingly small. By the bottom of the hill nobody remembers that part.

Every large thing had a beginning that would look silly in a photograph. The first version is supposed to be tiny, which is not a sign you picked wrong. Once something is rolling, nobody asks how small it was at the top of the hill, because the question stops being interesting.

Let your beginning be as small as it needs to be to actually happen this week. Five customers, three readers, one honest rep. Keep it moving rather than trying to launch it already big, because size is what motion does over time.