I keep in mind clearly being0 years elderly, & given the "big reading" in my school play. I was one time genuinely shaking, nerve-wracked, blustering & so on. My teacher told me to plant my feet solidly, hold my script & read out loud & proud to the back of the row. Looking around now I see plenty of professionals still addressing their audiences like that today!
Now I have written plenty of articles, & continue to train plenty of people...