Which area is the most suitable for civilian players in the kingdom era?

At the beginning, I just played this game, and there is a long mandatory game guide, which is that it must follow the task flow of the system, which is actually very beneficial for beginners to start the game. But now it's gone, it only takes a few steps to complete, and you can choose from them later, which also gives novices more space. So, I started my kingdom era in K333. At first, my castle looked rustic. Seeing many beautiful castles, I consulted other old players and learned that the castles behind will become more and more beautiful and have more functions.