This was Broome to Darwin, then Darwin to Cairns, two very different cruises.
Broome to Darwin was more about scenery, birds, geology, nature and seeing "outback" Australia. There were only 38 passengers on the 72 passenger ship.
Broome to Cairns included some of this but concentrated on indigenous communities and their art. The ship had 68 passengers on this leg.
Cabin had plenty of storage. Bathroom small but adequate with good shower with plentiful hot water. Serviced twice a day.
Shampoos etc good quality.