Each server is divided up by level, not by player times such as EQ was. Each server represents a continent (Western, Central, Eastern part of the world).
West is from level 1 to level 10 generally, with some higher level content in some areas. Central is level 10-20, thereabouts; East is level 18+.
These are only rough guidelines but if you get a new character approved to play, you will start on West and stay there for a while. There are a LOT of areas; plenty to explore before you travel to other continents!
If you go to downloads, above, there is a handbook available for perusal. Recommended!