I used to be a fan, unless I was doing something wrong on the website, you can only log in with proprietary software like github. You used to be able to just create a room. I realize that presents its own problems, but email should be an option.
Creatove Freedom Summit (https://creativefreedomsummit.com/) are doing their events with Jitsi, seems to be working fine. Other options would be Nextcloud Talk where someone recently told me they're using it in a university setting with lots of people and BigBlueButton which is also used by universities.