What my options would be if I were you:
1. Funny story. A science fiction short story would be perfect because you can write anything you want, especially is the place of action is another planet, with strange and funny creatures.
2. Funny story. Not science fiction this time. A short story telling about a young boy who wants to help people, but instead creates a lot of trouble. Like Denis the menace, for example.
3. A love story, but not an usual one. I would like to write about a bird who is in love with a tree, for example. Something totally unusual and moving. The tree is due to be cut down, and the bird stays with it even though the heavy winter is coming and the bird should fly south. In the end, the bird dies from cold. As the bird is falling to the ground, people with chainsaws walk towards the tree.
Anyway, whatever you write, just follow these rules:
1. Do not use capital letters in the middle of a sentence, unless the words represent proper names.
2. Always start a new sentence with capital letter.
3. Do not forget to end a sentence with a full stop or any other necessary punctuation sign.
4. Don't underestimate the importance of a comma. Learn how to use it.
Good luck!