(And if I'm ever not online, junior moderators, global moderators and admins definitely would be able to help you out with any questions or concerns you have. Other YWSers would be happy to help you as well!)
Before you get settled in, you might want to swing by the rules thread to see what's allowed on the site, and the FAQ thread to figure out how the site works. It explains a lot about the basics of the site, like how to post your works and how to get points. It was really useful to me back when I first joined the site, so hopefully it'll be just as useful for you!
Some fun areas of the site you might want to learn more about are the forums, blogs and Roleplay Section. The forums have fun games, writing activities, and places to talk about whatever writing project you're working on. The blogs aren't used as much as the other sections of the site, but you can post little life updates there. And the Roleplay Section is a place to collaborate on stories—either by roleplaying or co-writing novel-style stories.
I hope you enjoy your time on YWS!
Dec 23, 2022
How to Avoid Review Spam is a great resource for avoiding Review Spam - I also recommend these two resources - YWS Critique Sandwich and Review Templates - giving an interpretation and then pointing out specific areas they can improve on is always a great place to start.
Another place to check out if you haven't already is the YWS Welcome Mat it has a quick run-down of some of the rules for YWS as well as resources for getting started. If you need any help finding your way around feel free to reach out to myself or any moderator!
Best of luck in your writing endeavors!