Be one of the speakers at your local high school on Career Day. This gets you practice in front of what could be a tough group. (If you can keep their attention and inspire them, you can approach any audience.) Be sure to research the school first. Have they won any big games lately? What sport season are they in? What are the students focused on? What are their challenges? How can you make your own story something they can relate to?
Remember: Your audience isn’t limited to the students; it includes their parents and the school faculty.