Hello, Need Advice

Hello, I'd like some advice on how I should promote my work. I wrote a fic prompt (I think) on Ao3 for the Batfamily fandom and really want people's opinions on it, so I was hoping I can leave a link here on Reddit but I need some clarification if I'm breaking a rule or something or if there's a better way to spread the word. I hope I'm not being pushy or too forward with my request, I just really want some advice on this, I'd really appreciate it.