Thank you for the tips Yankee!

Do you have any pointers for what types of games a newb like me would have a likelier chance of thriving in, or should I just pick anything I think I would be interested in?  For example, would it be easier for me to participate in a large group or a smaller one?  Should I avoid advanced games until I have a decent amount of experience under my belt?

Also, for somebody who works full time, do you recommend only trying one game at a time?