I don’t know about you, but I think it’s very difficult to write a funny story. At least as far as plot goes. So my challenge for you is this:
Write a story relating to comedy in some way. It should be funny! Since funny is an opinion I’ll cut you some slack, but have your friend or sibling read it or something. If you think it’s funny, and two other people do too, it’s likely that it’s funny.
But even if it’s not funny, it must be related to the topic of comedy.