How am I supposed to "establish my credibility" in a persuasive speech as a high school student?

I'm writing about how beneficial vocational programs and classes and programs are in public high schools. How am I supposed to establish my credibility with something like that? It's not like I'm an educator or anything. I've only done my research.|||Have you or someone you know (maybe even lie and make a person up). And discuss how you KNOW that vocational programs are benificial. You need a person to use to refer back to thoughout your speech and give examples of that person that are the same as the statistics you found online.





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Find the opposing argument to your speech and completely tear it up and tell everyone why it's wrong. And of course give strong support to your side.|||To be persuasive you have to be confident. Expound on how much research you did on the subject. Be organized and act professional.