To help with your speech preparation, you may want to check out the links and ideas below.
This blog post captures some of the history of oral storytelling and its place in Maori culture. Long ago, when there was no other way of passing on information, telling stories orally was a powerful and important skill.
Some tips and tricks to help you tell a great story:
This article provides some good points to consider. Possibly the most important is the narrative perspective that you select. This blog goes into that and other areas.