I know this feeling and situation all too well! Fan fiction is super useful for improving skills and confidence as a writer, plus, I think it's super important and such a special part of fan culture. Basically, write all the fanfic and enjoy it. I do hope you can find the enthusiasm for an original project soon.

I'm kinda trying to get back into the habit of writing again as well. I'm thinking of using the momentum of nanowrimo to make it happen. 🤞🏽