Luckily someone else has already "made your own Discord" for us, and it's called Matrix.
It's E2EE and self-hosted, so unless you got snitches in your community that tattle to your hosting provider and then they go above-and-beyond and take action, you should be golden.
It's E2EE and self-hosted, so unless you got snitches in your community that tattle to your hosting provider and then they go above-and-beyond and take action, you should be golden.