Okay. I think that I should try to explain you everything.
First go to the main site. There you can see something like:
New Users / Welcome (1 Viewing)
New users can announce themselves and be welcomed to the community. This is the starting pad for new members.
Also, if you've returned to PC after at least a month of absence, feel free to get a warm re-welcome here.
Click at the new users/welcome. That 'New users/Welcome' is called a forum.
Next you can see something like this:
Sticky: The New Users Hangout(12345 ... Last Page)
Sticky: The Leave / Absence Thread(123)
Sticky: New Users / Welcome Rules & Links ; Updated 8/2009
Beachy
Helloze...... I am new!!!
Gallade!
Hi
The-Great-Falkner
New guy
Dasean010
I am back
darkfighter
Hey everyone!
Shravan
hi
Xtreme8899
hey
megalylac
[hello world (: ]
xxkaylabby
Salutations to you all!
Princess Pichu
Hi...
Ziebart23
Heey
haense
Hi peoples.
Rilence
Hey i'm new
dara012
I am NOT new
ultimatedood
Sup, I'm new.
gamer1132
Hello
Suikun
Newcomer
Ringtown'sBest
Hey guys!
jaseee
Tamer Kysen
Kysen
These 'Yo!' or 'Newcomer' or 'Hello' are threads. They have been made by the names shown for eg Dara012, Suikun,Kysen etc. You can take a look at them by clicking at the headings. These threads are there to introduce yourself to everybody. So start making a thread.
(In case you don't know how to make a thread, click at the new thread button at the bottom of the 'New users/Welcome thread'.)