Have you ever listened to a professional diversity and leadership speaker? If the answer is yes, then you may have equated speaker articulation with innate talent. However, such an impression is far from reality, because every innate talent must be honed on the touchstone of perseverance and hard work.
What you may have noticed about a speaker's ability to attract the attention of tens or even hundreds of people for every word spoken is the result of years of practice. The human voice is a powerful instrument, and human history is full of examples of people who became powerful speakers and inspired thousands through sheer rhetoric. You can also take direct diversity trainings from the speakers.
The first step to success as a professional speaker is to watch other speakers and practice on your own. There are many amazing speaker videos available online that you need to watch carefully to see how speakers use their pitch and pause to great effect.
Now try practicing speaking in a mirror, and then speaking in front of a small group of family and friends to gain confidence and ask them for additional feedback. Public speaking is not an easy thing for most people. In fact, it may be the biggest fear that many people dream of. So constant practice is the key to being a good public speaker.