With Discord **allegedly** going to IPO soon, I will again note that it has pretty decent moderation tools, which makes it quite unique amongst its competitors, proprietary or OSS. Ditching Discord means in part having a plan for how to moderate.
If you have a fediverse account, you can quote this note from your own instance. Search https://wandering.shop/users/xgranade/statuses/115857113266974416 on your instance and quote it. (Note that quoting is not supported in Mastodon.)
RE: https://wandering.shop/@xgranade/115857113266974416
Having been down this road, I am now 100% Team Discourse as a Discord exit for communities who don't require fully real-time communication. And for those who do, Discourse still has options. And as far as moderation, there's very little in the same league.