Hi Sam, and welcome!
I have to say, you've already started to find your way around if you managed to make your first trade in Trade Corner. Online trading is one of the most active communities here, thanks to the Quick Trade Thread, the Trade Corner chatroom and the various trade shops you'll find. Sadly, wi-fi problems keep me out of that section but at least I hang out in other parts of the site.
We also have some other parts of the site you can check out too, including the various Pokemon gaming discussions, including the upcoming X and Y games. If you ever need help, feel free to contact a moderator, just like Mac above me. They're pretty easy to spot so you won't have many problems reaching them.
Have a fun time here, and VM me if you need anything.