Echoing some other comments here, I highly recommend (in strongest possible terms) that you sit down with a lawyer well versed in Internet law wherever you are based out of and lay all of this out on the table for them.

All it takes is a bored official finding this thread or your site directly and your sincere effort here will transform into some kind of nightmare. Particularly given some of the major political swings recently, you have a target on your back and no megacorp legal team to protect you.

It is crazy easy to end up hosting an image known to NCMEC as seriously bad news and have no idea. Or NCII and not have an adequate reporting/actioning mechanism. Or someone tosses your user DB and people get harassed, swatted, or worse.

Not to mention you yourself are a target. By working on your passion project you've definitely already crossed lines that put you at physical risk if your info gets out. And over time the chance that it will climbs toward certainty.

I don't mean to dissuade you or wrap subtext in plausible corpolegal BS. I do mean, one human being to another, that you aren't merely building a fun community for people, you've also entered a field where very real, very heavy consequences--legal or not--now need to be a core part of your daily risk calculus.