Catalyst gaming*. I would be very interested in hearing about the first days of a nub- I remember mine, mostly minging around until LoneDestroyer was told to teach me how to play. Still, good times. It does seem like postwhoring, kind of, but it may be interesting.
About how to amass posts, you get one free post with your introduction thread. All other posts you need can be made by simply socializing in General Discussion, voicing your opinion on Suggestions (as long as it isn't a post saying just +support, remember to say EXACTLY why), and try to avoid necroposting- if there aren't any active threads for you to add to, just wait a few days. You can also take this time to begin writing your CCA application- make sure it's not too dry, and make your answers seem meaningful, and start thinking IC and OOC about what you may want to do in the CCA.
Good luck!