Pretty much what happened to me but the other way around. When I tried leveling healer in the DF and ended up with titan. I was so not prepared for it..then i realized afterwards that I should of unlocked WHM first lol.

Holding hate does get easier as you level since you get more tools, as a GLA you'll find it easier once you get the full combo, shield lob and provoke. The rest is flash and there's also circle of scorn at level 50. Warrior is easier to hold hate with since you get overpower and you get it early.