See what treasures you can find at home. Depending on my mood, I start with the Children' s section or the Folklore section of the library. Folk tales are a good place to begin. They come from many different countries and peoples. Folk tales were first told by storytellers who learned them from other storytellers.
Folk tales tend to be short, simple, and easy to tell.
Tall tales, like Paul Bunyan and John Henry, are a type of Folk tale, too. Myths, legends, and fairy tales tend to be longer, more complex, and harder to tell. All of these books easily lend themselves to storytelling. If you don' t like a story, it is very difficult to learn and hard to tell. Start with a story that tells well.