@PaintingArtist I'm not entirely sure I understand what you're trying to say, but I don't think that making a page is necessary. If your sister is looking for a page about academia aesthetics, you could redirect her to academia category - dark academia and light academia especially.
I second what Morning Star said - studying and reading are just a part of academia. What makes an academia aesthetic is how those are part of a different theme. For example, Dark Academia incorporates studying and reading into a study of classical literature, media with darker themes, and academia visuals (primarily libraries) (amongst other things).