Cube Tank. Jebo cube.
Research, and research more before picking fish. Then research more before choosing. Be prepared for everything possible before you create a home for them.
In the cube tank - Dwarf Puffers and bumblebee gobies. Had a Chinese River Goby but he mysteriously disappeared after 6 months of being in the tank.
An overview of the reef aquarium along with a short history.
In stressful times, having a home aquarium could be a benefit.
Learn the arguments for choosing to set-up either a freshwater or saltwater aquarium.