Public and professional speaking is a learned skill. Anyone can do it provided they are willing to put in the time and effort to learn that skill. You can greatly accelerate that process though mentors -- people who have "been there, done that" and can show you the way.

My mentors include World Champion's Edge: a team of past World Champions of Public Speaking "turned professional" who now provide a variety of products and services to Professional Speakers and to those who want to become Professionals.