I feel this so deeply. I can't remember the last time I wrote purely original fiction. Maybe... NaNoWriMo 2015? Most of what I've written since then is fanfic. I definitely don't regret it at all--I've written a lot of stuff, and most it's been fairly good--but I understand the feeling that I Should Be doing original fic and trying to get established as a writer and all that. And I don't even know how to write short stories! >__< I'm trying to change that, but sometimes I wonder if I'm even cut out to be a professional writer or if I should just stick to it as a hobby. In spite of the degree I got.

Okay this kind of turned into me talking about me, but I just wanted to say I know where you're coming from. I think you should do what you want to do, even if that's fanfic. Just because it's not "professional" doesn't mean it's not worth your time. :)