To get started: Create an account on the Cartridge Club Forums: http://cartridgeclub.bbforum.co/ucp.php?mode=register
Then introduce yourself in the 'Member Intros' area: http://cartridgeclub.bbforum.co/forum15.html
Check out the page and future games of the month: http://cartridgeclub.bbforum.co/forum26.html
After each month, a group of people that played the game that month get together and break it down in a podcast. Check out the podcasts here (or iTunes or Sticher): http://cartridgeclub.podbean.com/
Day to day, most Cartridge Club talk in the forums and on Twitter. Start with the Cartridge Bros on Twitter @CartridgeBros and @CartridgeBrosP2 https://twitter.com/CartridgeBros https://twitter.com/CartridgeBrosP2
See what everyone in the Cartridge Club is doing on the web site for the club: http://www.cartridgeclub.org/
The Cartridge Club is the best community I have ever been a part of. It is the only online community that I have been a part of which is free of toxic people that spread negativity. Members of the club all understand and respect each other. Knowledge sharing and helping each other is commonplace. It is a great place to spend some time and talk about gaming and collecting.