Knowing what a character wants, tells us what’s at stake in the story. Conflict between the character’s desire and their circumstances will keep your reader hooked.
Establish, within the first couple of sentences, your character’s desire. Put them in a situation that conflicts with that desire. Tell us how it works out.
It’s important for a reader to know what your character wants.
Once they know what your character wants, is afraid of, would never do, or desperately wants to do, the reader knows WHY they’re reading this story. That will keep them reading.
Keep it simple. In a short story, you can only examine one of your character’s desire.