Speak isn't based on a true story. It's a product of the author's imagination, designed to engage and evoke emotions through fictional characters and plotlines.
Add some emotions into it. If it was a sad story, share how you really felt at that time, like 'I was so heartbroken that I could barely breathe when it happened'. Also, create suspense. Start with something mysterious, like 'I never expected that day to change my life forever. It all began when...'.
Begin with identifying the types of love that are significant to you. Is it the love of a pet, a friend, or a family member? Once you've determined that, find the most impactful stories related to that love. Let's say it's the love of your best friend. You could start with the story of how you two met and how that friendship has been filled with love - like moments of support during difficult exams or adventures that strengthened your bond. Then expand on those details as you speak your story.
Practice regularly. Set aside some time each day to practice telling short stories. You can start with simple stories and gradually move on to more complex ones.