The best college essay advice I ever received was to keep a running list of moments in my life that meant something to me/were funny/wouldn’t happen to everyone. So many of my college essays sprung from one note on my phone where I’d jotted down little things about myself over the course of a couple months, as they happened.
Above all else, write about something that’s meaningful to you. I wrote about being a baseball fan and got into 7/9 schools that I applied to, including two with admit rates under 10%. It doesn’t have to be earth shattering to be good. Good luck!