If you wait until the right time to have a child you'll die childless, and I think film making is very much the same thing. You just have to take the plunge and just start shooting something even if it's bad.
“Some of the wise boys who say my music is loud, blatant and that's all should see the faces of the kids who have driven a hundred miles through the snow to see the band... to stand in front of the bandstand in an ecstasy all their own.”