It's the easiest dungeon of the three, yeah. I wouldn't go straight in there since there are dragons and goblin mobs. Level up your party and give them the right jobs first.Finally got to try the demo yesterday evening and, well... I suuuuuck so bad, it's a bit embarassing. Had to go back to the inn every 2 fights or so... and I was playing on Easy, so yeah
By the way, the "easy" area to train is the cave west of the city, right? But when I arrived there, I got ambushed by a bunch of 6 ennemies at once, poor Angès didn't make it out of there
Have you already done the smaller quests (the fetch quests)?