^ I’m not up to up speed on COPPA - what are they planning to do in 2020 that they have not done so far mate?
As for people sharing the same interests online - have you checked the various reddits, facebook & twitter groups for like-minded people? (older forums are great too - though some are not easily found via online search engines these days; sometimes it is not the forum themselves - but links and sources of info provided within)
In real life, try easing people into your interest - introduce the subject butlet them find their own way and make their own thoughts - and talk about it with them… hopefully it may become more of an interest to both them and you.