Undergraduate / Describe a challenge or obstacle you have overcome in your life: about my ADHD [3]

Or could you give me a link to a good resource regarding the topic of structuring college admissions essays. This is very urgent as I only have today to complete it. I deeply appreciate any feedback I get. And also, there is one more thing I wanted to ask. Do you think it is bad practice to use the same essay prompt for application essays for different colleges? For example, both UK and UC have the option to write an essay of your choice. So if I used UC's prompt "Define 'success' in your own words and explain how the college experience will help you to achieve it" and wrote the essay, and then decided to use that same essay for UK's "Select a topic of your choice" would it be bad? This is of course assuming I don't use UC's name in UK's essay and vice versa.