1.) Joining the group: Don't worry about waiting approval, you'll be automatically approved
2.) Submit to the correct folder! I personally don't mind putting the deviations in the correct folder, but just use common sense
3.) There is absolutely NO LIMIT to your submissions.
4.) Fan art is also accepted, except of course for anything from the My Little Pony fandom (because I know there can be horror-based arts of them) or any other fandom that tends to drive everyone insane with madness.
5.) The "Dead Spaces" folder is for deviations that have empty rooms or areas only, no living breathing creature should be any of those deviations. This folder can accept drawings, too.
6.) The "backyard" folder is for deviations that take place outside. If you're submitting a deviation (whether it be photography, photomanipulation, empty spaces, or even drawings) that takes place OUTSIDE, this is the folder you have to submit to.
Any questions, just ask.