Don’t really have any advice for you, unfortunately 😔 Just here to say that I had to give to a speech in my senior yr of high school (I’m 26 now) to the whole school (almost 500 kids). I remember standing up, saying hello, & sitting back down. My family said I did a great job, but obviously they’re a bit biased lol. So I don’t really know how my speech was, but no one said it was horrible, so I took that as a positive lol. Anyways, sorry for the ramble.. I wish you good luck!🙏