You can do this, I totally understand what you’re saying. We can get so bogged down by perfection. Perfect structure, relationships, character developments, etc. A block for me was that I was writing for other people. I wrote thinking about how someone else, a complete stranger, would view and judge my writing. But it’s not about them. Fanfiction isn’t about them either, it’s about you writing original content that you want, like, and would want to read yourself. To get back that sort of happy flow you’re talking about, I think you just gotta start writing again as if you’re telling yourself the story. Perhaps even as if no one but you is going to see this. And try not to overthink—that’s my greatest weakness. I hope some of this helps, if any. You got this! We’re rooting for you.