After taking a look, it seems that non-creators make up about 40% of my following, which makes sense considering that when I first started out I did all of my promotion here on the forums. Non-creator followers have been growing more significantly than creator followers though, and I think after about a year or so they'll make up the majority of my following.
As others have noted, creator engagement is much higher than reader engagement with my series. I would say 90% of my likes and comments come from readers (which I really appreciate.)