Set goals for yourself. Whether it's a career goal, a travel goal, or a personal development goal. Working towards these goals creates a narrative arc in your life. The journey of achieving them, with all the challenges and successes, will make your life story engaging.
You can try new things. For example, take up a new hobby like painting or learning a musical instrument. New experiences add different chapters to your life story.
Be open to meeting new people. Each person you meet brings a unique perspective and can influence your story in unexpected ways. You might learn from their stories and incorporate those lessons into your own life, making it more interesting.