I've used Jitsi Meet with ordinary (that is, non-IT) people without trouble.I've also recommended it to elementary school teachers, who have been happy with it.

I've used Jitsi Meet with ordinary (that is, non-IT) people without trouble.I've also recommended it to elementary school teachers, who have been happy with it. It works with desktop browser, on mobile it offers a minimal app installation. Self-hosting is quite easy with their apt repo.