I've belonged to this for more than ten years. It is a huge community of people who write, at all levels of experience. Mostly Americans, but many from all around the English-speaking world. There is a free course you can do to see if you like it, before paying to join. If you join, there are many interest groups, self-moderated. I belong to one focusing on literary short story writing, invitation only, full at the moment and not taking members. There are groups writing every kind of genre you can think of. The standard varies hugely from group to group, and from course to course.