Heavensward class quest

[Vidu]

Just to be clear, I have to go back to my ARR quest giver and he will lead me to my Heavensward class qeust NPC ?

Yes, you pick up the first HW-job-quests where the ARR-job-quests left you.

In most cases this first quest will lead you to your new job-master-NPC.
You can always check your journal under completed quest - it will tell you where you can pick up the next one!