What am I worth?

This is not some suicide post in disguise so please don’t think I am trying to say something between the lines with this. Insert segway to new topic- I have been watching so many different people in the world who are public speakers, who are sharing their knowledge or people who are listened to for they have a more valuable opinion for whatever reason. TEDxTeen is a positive example of this. I have always wanted to go on stage and have people listen to and be given insight from what I say, but it seems I can’t do this even on small scale. Is it selfish or mean or disrespecting for me to want this? Is it bad if I chase after the ability to try this once at least in some way I possibly could?