Nobody can do everything. There are zillions of things you can’t do, whether you want to do them or not.
Write about something that you can’t do and explain why not. If that doesn’t take up the whole page, write about something else that you can’t do and the reason why not.
You might find it helpful to write sentences of the form, “I can’t … because …”
When you have filled the page, reread your work and make small changes if you need to. Add color or decoration to your page, too.
When the page is completely finished, give it a title. Write your initials and the date on it, too.