Don't worry about making friends here at PC, if you go over the forums and participate in nearly all of the discussion, eventually you will get tons of friends. Especially around the Trade Corner as your are interested in trades & stuff like that. I'm sure you will meet a lot of people there who's interested in trading too. Together with the Competitive Battling Center! Buuuut, you might want to look around if ever you get bored of the two, there's a lot of sections available where you can discuss topics related to Pokemon as well as topics that are not related to Pokemon. And with that, welcome to the forums. :)
Don't forget to familiarize yourself with the rules and regulations here, if your not sure about a certain thing, then don't be shy or afraid to ask anyone of us, we;d be happy to help you out! Haave a fabulous time here and looking forward to see you around, then ~