It’s always tough to get people together by me too, if I’m not at school we can barely find enough for one side of sevens in my town. And I’m a girl, so I’d be playing with guys. I guess the best way to make it more organized is get enough people who are experienced and who are genuinely interested in playing. Don’t be too worried about perfect strategy if you are just playing around, usually the “games” in my town consist of a bunch of guys tackling each other for a ball on an open field. Embrace the informality of it until it becomes a more structured game as people learn more about it. Sorry if this doesn’t really help, I’ll post it publicly so that you might get some more input!