Are you trying to chat, or post in forums?
This site is pretty simple really, once you know how.
If you wanna enter the chat room, there's a big yellow button right at the top of this main forum page that says 'CHAT NOW'. That's where you click to enter the rooms.
Before you do though, select your options. You can choose to log in with or without using a webcam, and you can choose the option to hear other people speak or remain muted. Select your options, then click on the 'CHAT NOW' button.
Otherwise, there IS a text only room in the list of rooms, for those who don't like/don't have audio/cam capabilities.
I hope that helps, and welcome to CC!