Things to Consider for Narrative Writing

I recently faced the task of writing personal statements for university admissions, and, to be honest, I got confused. I don't know where to start and how to present myself correctly. Perhaps some of you have experience writing such statements? How did you choose the key moments from your life? How can a statement be made interesting and convincing?

I also encountered this task not long ago. Initially, I compiled a list of key moments in my life that could highlight my interests and achievements. Then, I selected several of the most important stories and linked them to why I am a suitable candidate for the chosen program. It's important to be specific and honest. But I also have questions: how to best organize the structure of the statement? And how to avoid common clichés?