Ahh! That makes a lot more sense. I think one of the main reasons I couldn't understand it was because I couldn't figure out how to win So what is a good nation for a complete beginner?
The Knights, Byzantium, Georgia.
...
That was sarcastic. They are some of the worst nations around to be truthful. The Knights have basically no income and their position is crap. Byzantium has the Ottomans busy trying to murder them, and we all know how that went in real life. Georgia is smack dab right in the middle of THREE HORDES. Two of them are very strong.
The easy ones would be:
France, portugal, britian. And just read some strategy guides before you play them, as they need to be played in different ways.
And Castle.
The ones I consider Easy-Medium (mostly based on read AARs, starting positions and how the AI preforms, but some of them are from experience) are Bavaria, Naples, Austria, Bohemia, Burgundy, Ming (China), and Milan.
But to be perfectly honest, do you REALLY want easy? It's no fun when it's easy.
Start with some random one-three province minor. So much more entertaining to make the small big, knowing what you started from. Conquering the world with France is far too easy.