> But I never found a good way to do it confidently, in a way that doesn’t make it seem like I can’t be trusted that I know what I’m doing.

It sounds like you're suffering from imposter syndrome. I promise you, no one thinks about you nearly as much as you think about you.

By the time you uttered the words, your team's mind has already moved on to something else.

Say the words and then follow up later.