Good luck ! I did the curse-secret-p.o.d. run in the past on the amiga

good memories, never finished pools of darkness but my save is still in my miggy

By the mids of the pools though my party was overwhelmingly strong so it actually killed the fun (I had a ranger/mage dual class which could hurl d.b.fireballs inside plate armor !)
About characters, of course you'ld be going for humans. What puzzled me though was if you start of pool of radiance, you don't have access to paladin and ranger which sucks big time. Therefore I started my run from the curse. If you're gonna start from the pool probably you should have some fighters and dual class later on in the secret (the later you switch, the better). Anyway, good luck, secret was the most boring one AFAIR with the most linear play. Pools of Darkness is the most awesome one though. (btw, stay away from the pools of darkness novel. it's such a joke. just check
this review lol

curse novel and the trilogy is awesome though, definitely recommended !)