you should easily be able to find quest the quest givers all have the same "mark" above their heads as on the starter isle. IIRC there is an option in the settings to turn off quest marks, make sure you haven't inadvertent disabled them. Destinations is a great tool just make sure you've installed it correctly because it works fine.
If none of that help try searching for zone quest guides online like this one.
http://dulfy.net/2014/02/25/eso-glenumbra-quest-guide/
you should have guild quests(mage, fighter, undaunted)
main Story quests( pay attention to any ghostly apparitions that appear telling you to go somewhere)
crafting quests
and lots of generic filler quests(that are often as enjoyable as the main story quests)