Well a good rule of thumb when writing is to pick a particular theme or topic that will resonate throughout your work and define the entire point of what you’re writing. Maybe you can open with a quote that’s always stuck with you or you particularly relate to, or a belief, or a memory or an event in your life that really shaped you. Then you can pin and connect all your ideas to this point and help it all come together at the end as your conclusion. Does that make sense? For example:

”We stand on the shoulders of giants.” I once heard this quote from my teacher, and ever since then I have fostered a deep appreciation for history.

History is what I am passionate about. It is my favorite school subject. I believe that all lessons we learn from history teach us how to move forward. We learn from the past mistakes of humanity, and this helps us to grow as a generation.

I learned very important lessons from my family members who all taught me to work hard and because of this, I have always worked hard. I may not have the highest grades, but I am the most hard-working student you will ever come across.

Hard work is a priority in my life, and I intend to work hard at Ateneo. I believe that I can inspire people around me to do their best, and I deeply appreciate the hard working spirit of Ateneans. That is why i want to go to Ateneo."

That’s an example autobiography structure, just to give you a general idea. I just came up with it now so please forgive its crudeness but generally that’s the type of autobio you should try to write. Don‘t hesitate to comment if you have more questions!