I think it is no smoking in every room except balcony rooms. Usually, a certain side of the ship [starboard on our previous crusies] is designated as a smoking area. I think you can still smoke in the casino also.
As far as your location on the ship, go to Carnival's web site and pull up the Triumph. You can deck to deck and see where the elevators, steps and other areas are located.
PS You will love the Triumph. We took her shortly after her maiden voyage.