I don't really know what's happening in this game. xD
At lower levels, just follow the story quest(yellow questline) to about level 19-20, till when you get asked to run Darkfall. Then any high level player can run you through dungeons(you get fast dungeon runs and they get imperial merit) , hit me up to help you in dungeons if am online. Basically the first 20-30 levels is mostly story/orange quests along with a few dungeons. After that it is mostly doing your dailies(you can see them when you press U). Make sure you do your growth(orange) quests whenever you get a new one because they unlock new features and give good rewards.