One way to find topics to research is to look up “Metamorphosis” on Google Scholar (google search: google scholar and it will take you to a new segment of Google- only academic papers). “The Metamorphosis” was written when society was at an upheaval- WWI had just started, the Industrial Age was in full force, corrupt governments existed worldwide, change was happening fast and people had to reshape their identity. Was this story a social commentary or a straight out freak-story? Some topics you could research is whether the story is symbolic, and if so, how is it symbolic—what does the change symbolize? Or was humankind’s perception of itself changing, people changing into something ugly, or humans becoming so industrialized that they’ve become bugs/inhumane/drones? I checked Google Scholar- there’s a lot more ideas there, especially if you put in “The Metamorphosis Kafka” and another term like “society,” or “allegory” or “symbolism.” Good luck on your paper!