It may also help if you're what's known as an "outward introvert." This topic is discussed in the book "the highly sensitive person" where introverts are basica

It may also help if you're what's known as an "outward introvert." This topic is discussed in the book "the highly sensitive person" where introverts are basically dissected along the lines of "outward" and "inward." I would consider myself an "outward introvert" (like an extrovert except I pay a bit more dearly for it after the fact) and have no problem with public speaking, teaching, etc. I have a good friend who is an "inward introvert" and she avoids anything even close to speaking to a group.