Rogues also need to know the quests. JM has played every quest with every class and remembers where every trap and box is located; it really helps avoid disaster!!

The game has a 'tutorial' island where you begin so that is an easy place to try out a couple of builds. Go for it!!
Rogues in DDO have excellent sneak attack skills and bonuses I played a dual wielding backstabbing build to cap and was regularly getting 5 damage numbers per attack.