I’m curious, were you a fan fiction author before you published an original novel?
There’s no “before” about it: like a lot of (particularly female) authors nowadays I’ve always written both fan- and original fiction.
I don’t publicly link my fan author name with my pro author name, again for the same reason most pro authors don’t (i.e. some people in fandom can be really assholish about it). But, yeah. I write fic.