[licker]

Well I don't know what you don't understand.

There are movement arrows (which I assume you've turned on, press '8' or '9' to activate them, the other does province names) and you can see how everything is connected.

Go to a node by right clicking on it and you'll see all the places it leads to. Move your armies as you would to any other province, really they are no different, they are just located on the edge of the map. The nodes are not the be all end all for the game though, while they do provide extra gems they also make you potentially a bigger target.

Start a new game on the map with indies set to 1 and just cruise some armies around to get a feel for what's where and what and all that, shouldn't take you more than 15 minutes to understand what the nodes are and how they connect to things.