You are no different. Even if you think you're really good at speaking, there will come times when your heart stops and your palms sweat and you freeze before an audience.
Toastmasters can help with that.
Almost everyone will remember how wretched they felt when they gave their first speech. You may be startled to find out how supportive a Toastmasters club really can be. Ditto for the second. Some tears after the third. Eventually she realized that we weren't going to eat her alive and she came to enjoy it.