While some of what the thread linked to below goes into may be a bit more advanced, from where you are right now, I would say it is worth clicking the bookmark icon on it so you can find it again when it does become relevant and the conversation clicks. For now it would be worth skimming it to see illustrations of two main things:
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Scrivener has ample feature set for handling projects that are designed to export multiple discrete components (whatever that might be: articles, books, short stories, poems…).
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As I note in one of my follow-ups there, this forum is absolutely stuffed with conversation on this matter, and all aspects surrounding it, from compile to practical usage to organisation tactics. But as a matter of finding them with the forum search tool, you should know most people, when phrasing such discussions, will use words like “trilogy” or “multiple books”.
A short story is, from how you use the features in Scrivener, functionally equivalent to a book in a trilogy. While there will of course be details that are different (numbering chapters will be of little interest in most short stories for example), the high level features you use to sort things into groups, and designate them for your word count tracking and other features, are all overlapping.