Every minute on the edge of the diving board, your brain invents another excuse. Jump before it finishes typing.

The longer you stand at the edge, the more reasons your mind produces, and they get more convincing as they go. That is not new information arriving, it is a system built to keep you where things are safe, running exactly as designed. Every extra second of deliberation writes another sentence in its favor.

Make a rule for small frightening things and move before the third excuse finishes forming. Three seconds, then go. Save the long deliberation for decisions that are genuinely complicated rather than simply uncomfortable.