Anyone in the world does not become an expert overnight; they have also gone through the same stage that you are in now.
You have to work on emotional intelligence and learn how to become an effective communicator.
Confidence comes from preparation, and preparation will be complete only when you practice, practice, and practice.
Find out what challenges you are facing and work on that. If you are facing stage fright or are shy, then take advice from communication experts, and they can guide you in the right direction to overcome your challenges.
Jargon
Engage, Interactive, Resilient, Level up