Everyone can post now. Those who are not in a team as of yet will be added as soon as we find a way to add them. Even those that have no team yet can post - you just can't participate in anything meaningful yet. Sorry. That's the price of taking your time.

Regardless, feel free to post anything - your character can be at home, outside, getting food, or something random. The jonins will seek out members of their team and get them together.