I also agree with the idea of making it into a short story instead!
For one of my stories, I wanted to make it really long. But once I started writing and planning my episodes, I realized I would’ve been dragging it out. I couldn’t think of how to make it last longer and still be interested. So I cut it down to a 10 episode story and it worked perfectly! So definitely don’t force yourself to make it longer. Plan all the events you want to take place, and then wrap it up even if it’s only a couple episodes 