Welcome to the forums! Generally all you really need to know is the rules: www.elitefourum.com/t/the-rules-read-here-first/14022/1
It sounds like you’re already aware of some of them though!
Other than that, tell us more about your interests in the hobby - what are you collecting right now, what are your goals, etc. Maybe make a collection post too when you get around to it! Otherwise, look through the threads, participate where you feel like you can, and go from there.
Cheers!