Hi there, you can find friends in many sections that are easy to post in, such as The Treehouse, Video Games, Forum Games, and Pokemon Trivia. These sections are fast pace. You will encounter lots of friendly people that are pretty easy to accept others.
You could always post hello in the Welcome Lounge and approach someone who's looking to find a new friend.
If you're interested in playing the current Pokemon games, feel free to browse the Trade, Battle, or Challenges forum where you'll find members who like doing that specific activity. The members in these sections would be relatively quick to accept a fresh face that participates.
Many sections have a stickied thread called the DCC, or Daily Chit Chat. For example, the one in Pokemon General is located at:
http://www.pokecommunity.com/showthread.php?t=339045
It really depends on your interests, and then you find those members with your similar interests.