Got over my fear of sharing my ideas, and posted more details on my app to Indie Hackers. It's liberating!
I don't know where this fear came from, but a quick Google search seems to be a topic you can find plenty of articles on. Those with ideas that are just inherently afraid to share with others.
I finally got over it today because I'm honestly past the idea stage. I have an MVP, I have paying users, and I'm trying to grow. I need to let my baby run free and avoid locking her away until I'm ready for her to see the world.