The person you tell first helps determine what the event becomes in your own account.

Whoever you tell first shapes what the event becomes. Their reaction gets folded into your own account, and the version you tell afterwards carries their emphasis, their framing, their concern. You are not just reporting; you are drafting, with help you did not ask for.

So choose the first listener with that in mind when something significant happens. Someone who will let you be uncertain, rather than someone who will immediately tell you what it means. And when you are the first to hear something, hold your interpretation back for a while, because whatever you supply is likely to end up in their permanent version of it.