Make your voice go down in pitch at the end of a phrase or sentence. This technique emphasizes what you're talking about. If you want to also add to your presence, pause after speaking.
I was recently on The World’s First Podcast with Erin and Sara Foster. We talked about how to be confident in your own voice and many topics relating to public speaking including how to calm nerves, how to speak in front of a group, techniques for impromptu speaking situations, leaning into your vulnerability and much more.