No chat speak. Lol is fine and brb, and I'm not sure about the rest, but normally when you're new they cut you bunches of slack. So! No worries. Just don't go omg lol tgif insane okay? 
Rate your works. When submitting a writing piece, you have the option to rate them G, PG, Pg-13, or R. If it has strong language, adult situations, or even nothing like that, rate it! If you rate it, then people know what they are sticking their eyeballs in, and the piece of writing shows up on the front page! That might even get you more reviews, and who doesn't want that? 
Here, we have a 2:1 ratio. That means when you submit one of your pieces, you must review two other people's pieces. That way, everyone gets reviewed and your points stay up.
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So, maybe you noticed that some people on YWS have colored user names. Here's a little guide:
Black: Normal members, like you.
Blue: Greeters, they help new members get around the site and answer their questions.
Purple: Instructors, they give the best, most in-depth reviews.
Light Green: Junior moderators, they moderate some forums.
Dark Green: Moderators, they moderate all forums.
Red: Site administrators, they keep the site running smoothly.
Orange: They are distinguished members, retired moderators.
120,214 Literary Works • 649,127 Reviews
Gender:
Points: 300
Reviews: 0