I’ve seen a lot of fic writers afraid to write a character or ship, because they worry the fandom won’t approve of their version. They worry they won’t ‘get it right.’ I’ve seen them quite literally ask “can I write…?” whatever it is they want to write.
So, in case no one has answered you yet, allow me. The answer is yes. Yes you can. In fact,
You can give yourself permission.
There is no boss of fan fiction. No one has been elected moral or intellectual authority of your fandom. We are all just a bunch of fucking weirdo nerds here, and don’t let anyone tell you any different.
Fan fiction should mean creative freedom to give something a go. It truly does not matter if your headcanon about a character doesn’t match up with someone else’s. It doesn’t matter if you haven’t read the books or the comics or the blah blah blah. It doesn’t matter if you do intensive research or just have fun plugging names into your favorite tropes.
It only matters that you create something, because creating something is good for the soul, even if it just momentarily distracts you from what can be an utter shitfest of an existence.
I can’t promise that you won’t get criticism for it on the internet. But avoiding all criticism is not a possible or even a worthy life goal. So go ahead.
Give yourself permission.
literally do whatever the fuck you want