Here’s a short list of what it takes to be an effective public speaker. These lessons apply whether you’re giving your first speech and you are terrified, or if you are in your 20th year on the speaking circuit:
Treasure the first 60 seconds.
If you’re terrified, work that into your opening.
Know your audience.
Manage your space as a director would.
Vary your tone, volume, timing and demeanor.
Go for it.