The more you have prepared, researched, learned, thought, talked, or organized, the more you are likely to complete whatever task or life changes you face. You’re that much closer.
That doesn’t mean that you don’t start something or make the jump until everything is in place, because everything will never all be in place. But give yourself the strongest possible starting point you deserve and then go from there.
What does “well begun” look like for you?
Is it writing out a list? Is it talking out loud to a friend? Is it a research rabbit hole on Google? Knowing what this is for you is a great first step.