Hi Loki!! Welcome to PC, wonderful to have you here~
Like Archy said, PC's a big site and there's a lot of fun stuff to do and people to meet here. So I think the best advice would be, just don't be shy! What kinds of things are you into, by the way? The Pokemon games? The anime? Romhacking? Non-Pokemon related stuff? Remember that if you ever need help or have any questions, you can always ask one of the staff, we're happy to help!