Study and know the information you are sharing in your speech.
Rehearsal is nice. It helps you plan what you’re going to talk about. It helps you create a flow and gives you comfort and confidence.
If you don’t know your content, you will always feel like something is missing. That “emptiness,” for lack of a better term, will block you from delivering the speech you’re capable of.
It might cause you to have stage fright, not because you are afraid of the audience, but because you weren’t prepared when you put yourself in front of them.
The nervousness of being in front of an audience will pale in comparison to the fear you’ll have if you don’t know what to say next – because you weren’t prepared.