And a reminder that the college admissions process can be brutal at times so take it easy and as always, a decision is not indicative of your worth or intelligence. As much time and effort you put in during your four years of high school, sometimes a lot of your chances are out of your control or up to your application in those last few months—whether that helps you or not.
I don’t think I’m qualified to be giving actual advice so here are some resources I found helpful, if you're planning to apply soon:
CollegeVine: (site) has helpful profiles of every college and an algorithm that generally predicts your chances at each one
College Essay Guy: (Articles) good breakdown of the UC PIQs and Common App prompts w/ examples
SupertutorTV: (YT channel) examples of effective essay topics, etc
Music by Soul Prod