the art is in making it interesting. That usually means coming
up with interesting, relevant stories to flesh out your points.
unlike a lot of art, anyone can be a good public speaker.
Observe yourself as you speak while standing in front of a mirror. This will help to build confidence and spot some of your common mistakes. When you feel you are ready, speak in front of a few people like family members or friends. Their comments will help you see how you can improve. Remember 'Practice makes perfect'. You can easily acquire all the qualities of a good speaker through practice.