Hello Teacupings I'm That-irish-guy I'm here to help you with some information for the site.
Etiquette I, much like you just want to enjoy the work people do on the site and don't really want to make any deviations. But something that I do is I try to help people make their work better by commenting and sending notes.
I hope you have a fun time on deviantart and please if you need help just ask.
Here's to you.