I hardly recommend you to play Durge first playthrough. Especially if you played bg1, 2 before.
Nope, strong disagree.
Unless you plan to play the game only ONCE of course.
I would go plain class (no multiclassing yet) and regular character (no origin or dark urge).
Just play your favorite race and favorite class.
The only tip I have is take a good look at the rulesystem and plan ahead. Especially plan what feats to take.
Playing Dark Urge as first playthrough is like playing Vampire Bloodlines immediate als Malkavian.