Where do you find the beta users?

Hi all, We're a small team building for AI translation tool specialized for stories. I have to say that finding the beta users is Farrr more harder than we expected. Hope to hear your voices and advices on how to find the first matching beta users? By which channels or methods? I've tried Reddit, and I have to say it's quite useful but the users here are quite fragmented and the subreddit rules are strict lol.. btw for those who are writers and wanna translate and share globally, please please please leave your cmmts below!!!