Humans are Hardwired for Storytelling
"How was your day?"
If someone asked you the simple question "how was your day?", you would instantly and automatically arrange your answer into a story.
You would consider the medium and your audience, and model your answer in the format of a "my day was" story that takes into account your relationship to the person asking, including any shared context and inside jokes you may have.
You would consider all the events of the day and instantly know the tone and theme of your little story of the day, and connect events that reinforce that theme and downplay events that undermine it. If your day was overall good, you would focus on the good parts, and maybe string in a few counterexamples starting with a "but". If your day was bad, you would flip your approach, playing up how awful everything was and pointing out the good things only to build tension before your tragic setbacks.
You would know what to add to your story and what to leave out intuitively, editing out the boring details to succinctly tell your story.
You would automatically know to start at the beginning and move from point to point towards your conclusion.
You would effortlessly construct sentences and arrange them together in a way that flows naturally.
Humans are so hardwired for storytelling that we can do it before we can read or write, needing only the most basic vocabulary of speech to begin.
Storytelling is the way that we interpret the real world, using metaphors and allusions and culturally understood shorthand so automatically that we only realize that we are doing it once we learn enough about other languages and cultures to notice that they have a whole different set of stories they use to talk about the world.
Storytelling is so innate to humans that it is one of the essential parts of what it means to be human; we are the animal that tells stories.
If you can tell someone how your day was, then you ready for creative writing.