Haha, I guess this is entertainment. But we all start somewhere.
People have given you good advice on this forum:
Copy RunicGames, for example; they made the game Torchlight. Start of with a simple single player game; make it fun. Then add co-opp support so you can play with friends (Torchlight II). Once you have done this, you can ride off the success and hopefully extend it to an MMO (Torchlight MMO) if its good. For small teams, I find Runic an excellent example to follow - plus they're happy to document their progress in the forums/ dev blogs.
Also, this is a good idea for you as Esenthel plans multi-player later in his roadmap;
http://www.esenthel.com/community/showth...p?tid=1507
The time it takes for Esenthel to get through that roadmap and finish multiplayer will be good for you to focus on learning to use the engine, and C++. But don't let this discourage you from making a MMO immediately, some people learn fastest in failing. But yeah, study bloody masacre, and try to combine some of the tutorials; e.g. "17 - Camera Collisions" with "03 - World with Character" in Source\Advanced\4 - Demos, Game Basics\Game Basics