You’re not lost, just… off track slightly 
Your quest log and map will point you in the right direction for things like the War Campaign and main storylines though.
You have started and finished some BFA quests already, the Heart of Azeroth you’re wearing is a BFA questline.
You even already completed Welcome to Zandalar and have done the intro quests to get to Zandalar.
You picked Zuldazar as your first zone, and still have one of the early quests for that zone in progress.
So to get restarted again, head back to Dazar’alor and then check your map of Zuldazar, you should be able to find your way from there as the map will show you markers to guide you to next quests.