Is there a way to get all the stories in your feeds?

Is there a way to export a list (like a json or something) of all the stories in your feeds? Not the links to the feeds themselves, the actual stories.

I recently started exploring RSS and I…kind of bitten off more than I can chew. I subscribed to some feeds like ScreenRant that post wayyyyy too often and it’s super overwhelming. Before I unsubscribe or use that intelligence trainer thing, I want to get a list of all the entries that are already there so I don’t miss anything I’d actually be interested in. Is this possible?