After you complete the tutorial the point of this game is whatever you make of it. You can chase achievements, level your character in different skills, join a guild and battle other guilds, try to take territory, lease out your own shops, buy an island, farm crops, craft items and sell them in the marketplace, or run dungeons alone or with friends. There's plenty more I'm leaving out, but the point is there is no overarching main storyline to worry about. You simply do what you'd like.