Well the first thing i recommend (though most people do this when they join in the first) which is going into ts to see who is in the channels of the game they main. For you its diablo 3 ,which has its members but it comes down to timing . So if you are ever worried or unsure about the time ,i kinda suggest that you check out the forums. All you really need is that one or two people to hook up with in a group ,and from there youll get a bunch of others.
Its happened for me with others games,and just some advice i can give to another great member in fever. I hope you get a nice welcome along with a fun time when you are around.