How do we write a personal narrative?

k so I've 2 write a personal narrative abt a tym I misbehaved in my childhood n vat did I learn abt it n also I've 2 use 1st perrson, phrases, descriptive adjectives and storng verbs so if any1 can hlp me write a fake stry cuz I cnt thnk of anythng. plz b quick :)