My advice - and I mean this most sincerely: find a DIFFERENT game!
Trying to make money off domains is not for everyone. In fact, you can see thousands of people who lost money for every one person who made money simply by browsing the ebay Domain for Sale listings (or any domain auction site!)
You don't have to go that far, even - most of the posters on this site have probably lost more money registering names than they've ever made selling them...
Perhaps you'd be better off investing your money and time doing something you have more ability for, so that you have a better chance of seeing a POSITIVE return for your effort.