Well, you can start from the very beginning. Like when the story first began, what was the initial situation or event that set everything in motion.
Begin with the main characters in your story. Who are they? What are their relationships to you? This will help me better understand the context. For instance, if it's a story about your family, start by introducing your family members.
You could start with the most interesting or significant part of your story. This will immediately grab my attention. For example, if it's a story about a trip, start with the most exciting moment during that trip, like seeing a beautiful sunset on a mountaintop.