Does it really have to be live? Some places let you colaboratively add to pages, so you get the advantage of evolution as people wake and work.

It's a big ask, but surely you can solution it.

That sounds like a very big ask. Even assuming you can find a time that isn't in the middle of the night for everyone, it's unlikely that you will be able to find a time that won't clash with work or something else unavoidable. In terms of night time - there's a lot of the Pacific that is sparsely populated. Perhaps when it's night there, it's daytime for more people? But perhaps you need to review how you communicate? Perhaps instead have messages that people can listen to when it suits them? Are you just writing? Or listening and speaking as well? Do you have someone to give you feedback? I once listened in on a supposed English learning group. They were talking to each other, but not in an English I recognised. I couldn't understand a word of it. That's something to beware of.