Once upon a time there was you, you were born, you had desires, you had goals. You either failed or succeeded in achieving them. No matter how it ended, no matter how it ends, that’s your storyline in a nutshell.
You’re the protagonist of your own life, it has been so since you were born.
Remember when you were young? You had desires, things you wanted to accomplish, like playing in the bathroom while Mommy was cooking. Did you succeed? Did you fail?
Upon your quest, you came across obstacles, challenges that tried to deter your journey towards achieving your desires (like playing in the bathroom). At the end of it all, you either succeeded and met your desires or failed.
As you grew up you may have encountered people who didn’t understand what you do and why you do it. You may have come across your antagonist(s), these are the people who wouldn’t rejoice seeing you reach your desires and/or your goals.
Your part in all this is striving to be the hero of your story.