A song you wrote that ten people heard still changed those ten people’s afternoon.

Reach is the wrong measure of whether something worked. Ten people is not a failed thousand, it is ten actual afternoons that went differently because of something you made. The effect on each of them is identical to the effect it would have had on one person inside a crowd of millions.

Finish the thing you have been sitting on and show it to a small number of people you trust. Watch what happens in the room instead of counting anything, because that is the only useful information at this stage.