Readiness includes knowing which part you will have to learn while doing it.

Waiting to be fully prepared assumes every part can be learned in advance, and some of it cannot. There is always a portion of a new job, a first child, a move, or a project that teaches itself only once you are inside it, and pretending otherwise turns an ordinary gap into an alarming discovery halfway through. Real readiness is knowing where that gap sits and deciding to enter it anyway.

Before your next large step, write down which parts you know and which you will be learning live. Then arrange help for the second list instead of trying to shorten it.