It can be beneficial to find a role model and engage in some healthy imitation. Done well, it can give you some confidence.

You shouldn’t copy everything about the person. But notice how they act and try mimicking their successful habits until you can adapt them to your own style. 

Act as an self confident person till you eventually become one. Our bodies govern how we feel about ourselves; just like animals, people tend to shrink when they have slim self confidence, and expand when they have high self confidence. These postures are called low power poses a...

Make it about the ideas you want to share.

Take the focus off of yourself and putting it instead onto the valuable information you are going to deliver. That way, the speech becomes an exchange of ideas and it creates a place of passion and purpose.