Most people wait to feel confident before they send the application, post the content, or take the call.
That is backwards.
Confidence is not the permission slip you get before you act. It is what you collect after. It comes from the reps. From seeing you survived the scary thing and some of it actually worked.
The imposter thought is allowed to show up. It just does not get to veto the action.
You do not wait to feel ready. You act, and ready arrives later.