Welcome to the Guild, Spartan!
If you happen to have any questions about the forum or need some help getting around, feel free to ask me or one of the other Comrades. We're the users with italicised usernames, and we'd be happy to lend a hand if you need it.
If you're looking to get started nice and quickly, I'd recommend starting with the Guild's Guide. It should answer most of your questions.
And it's likely because you've only just joined. Your posting is also limited during the early stages of your time on RPG, although I believe it is removed after you've posted an introduction thread.