Stories are easy to write. Good stories are not; they are both difficult and tedious. But they are also rewarding, at least personally. Monetarily maybe not so much so. Anyone who tells you otherwise is either foolish, or more likely trying to sell you something like a writing course or publishing service or an AI writing program to do it all for you (claiming you just have to sit back and collect the money).
So what is the difference between an easy-to-write story and a good one? It is largely subjective. Some people delight in the simple tale, others demand more extensive tomes. Read a Harlequin Romance if you so desire, or immerse yourself in Leo Tolstoy; it's your choice. However when it comes to what you write, the style depends on what you are trying to convey.
A story isn't 'automatically' good because it's long or uses polysyllabic words or contains florid prose. Excessive details don't help. When you describe someone's attire should you mention the socks? It is assumed they are wearing socks (or perhaps stockings) because they are dressed. The socks only become a necessary detail if they are important to the plot: putting on woollen socks because it is cold, or fishnet stockings because it will get 'hot', or mismatched socks so someone later in the tale can make fun of them. Beyond that they do not matter. The same is true of every detail; that the room is 'large' may be important, but the exact dimensions probably aren't.
The idea is always to tell the story to the intended audience, thus your writing style has to be suitable for whomever you expect to be reading it. Even then expect criticism; there are those who feel they simply must point out every plot hole, every anachronism, every descriptive discrepancy, every typographical error. Let them. And ignore them. Although I confess it is a great reason why I do not publish my work; I don't mind sharing with people who like it, but I have no time for those who will attack the work solely for the sake of feeling superior to the author. If you think it's so easy to write, 'Mr. Critic', you do it.
Which is exactly the point of this series: if after all the negative aspects I've outlined here you still feel the need to put your story down in written form, then you have the right motivation for doing it. Oh and always retain full creative control in case someone wants to make it into a movie, or else be at ease with seeing your work turned into something unrecognisable.
There is one last thing which every story should include, and that is this:
The End.
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