Write about why writing is awkward. Or whatever else you want to say but don’t think you can.
Write about the most interesting people you know. They can be your age, older, or younger. They don’t have to be considered interesting by anyone but you. They just have to be people you think are cool.
Write about your most embarrassing moment. You can embellish as much as you want. (This might be a stretch–but it won’t be so embarrassing once you’ve put it into words!)