The first 17 levels of the game are considered to be the 'training' levels. The quests that are given during the first seventeen levels are all designed to teach you how to play the game. It can be unwise to deviate from just completing these quests.
The following quest chains are all part of your in-game training:
|Pinewood Plank Production||Short||1|
|Claim New Lands||Medium||7||