If you want to become a CM, apply for the position by going to either Kudasai's or Hisagi's profile. It would help to get an endorsement from a staff member. Since this is your first time on the forums, I would not suggest you applying to become a CM. Get use to the forums, wait for a few months, and you can apply from there.
Also, you need TeamSpeak as well and get use to it and apply for membership once you are allowed to (which is in a month at the time you got on TeamSpeak for the first time).