The rules for the group are pretty lax, but that doesn't mean they aren't a few to adhere too.
Submissions are limited to 7 per folder per day, as I doubt anyone has that many things to submit.
If in doubt what folder your work belongs in feel free to ask me, don't worry this happens to me all the time with other groups.
Yaoi/Yuri/18+ is fine, but please do your best to mark mature if mature as not everyone likes to look at it.
Be tolerant of everyone's work. Not everyone has unbelievable skill, but that doesn't mean that they won't have if they keep trying. So please, be nice to everyone's art.
Overall just have fun!