Focus on what is being said
If you keep thinking about how to behave and whether the audience will like you, it's natural to feel scared. In fact, the best way to calm down before giving a speech is to return to the content itself.
Focus on what you want to say! The most important thing is to focus on your opening statement: Although the duration of the speech may vary, your chance to attract the audience's attention and establish their trust in you is only in the first 60 seconds. If you cannot deliver the content that attracts them in the first 60 seconds of the speech, then you will no longer have this opportunity.
Believe in yourself, YES, YOU CAN!