Check out nostr:npub1yx6pjypd4r7qh2gysjhvjd9l2km6hnm4amdnjyjw3467fy05rf0qfp7kza's work on Corny Chats. He's working on a live voice and video chat platform that is integrated with Nostr, and I believe there are some open issues/bounties to pick up on that project.