5 days
I’ve seen this work in a microblog format. DM would describe the scenario and people would respond with what they think the character should do. DM would choose one move (not sure if it was random or the move they found most interesting) and then explain what happened. So the story had a single character controlled by the group. It was light-hearted, low-stakes fun :)
Hope you start the community and give it a shot. Experiment to find the format that works best.
I don’t think they’re looking for the easiest language. Learning any language is hard. There must be a motive to take on such a task.
Weebs love Japanese anime so they want to learn the language. I doubt many people are into Chinese anime or manhua aside from native speakers.