Indeed, fans must go through Blizzard's servers in order to join up with a friend, and that may be slightly disappointing to players that were looking for a couch co-op game.
So we want to start a co-op game to see how far we can make, while fun is much more important than competition. I did some research on the topic, but the results were a bit overwhelming and some were on old versions. So I world be really thankful for some beginner friendly tips. .