Void Elf Quests

Trying to unlock the void elf race and cant seem to start the " You are now prepared"“The assault begins”. I’ve took quite a long break and now I’ve come back and cant seem to figure out where i left off.

-I’ve tried talking to Khadgar
-I can get to argus and world quests are unlocked

But when I look at my achievements seems nothing has progressed towards “you are now prepared”.

I’d like to note that I have recently changed my character from horde to alliance and I am not sure if this could have messed with what i’m trying to do at all(the goblin warlock i’m posting on is now a human warlock). Any help would be much appreciated as I have spent roughly 2 hours trying to figure this out myself.