Need a Help

I need your help, i have never played a mod before for CoH, so i'm in trouble with a few things.

1) I have heard that there is a single player campaign right? What do i have to do to play it? Or are just skirmish??

2)If i want to play online with other players, how can i do?

Firstly, help topics are not to be posted in "GENERAL DISCUSSION", post it in "Bugs & Tech Support". >:(

Second, there is no campaign yet, there will be in a misterious future... modders keep secret about it, but they said it will be. ;)

Third, for onlie playing, just do like always, nothing changes.. :-*

oh sorry for bad section :(
anyway cos i started CoH EF but in the main screen where you search for games it's completely empty and i have a friend who has EF but when he host a game i cant connect to him.
Could it be cos i have already some mods installed like Historical Skin Mod or European Theatre?