This biocube 29 has been running for 2 years and inludes serveral retrofits like Nanotuners 5.6 LED retrofit.
Online resources are unlimited for this hobby. Read a ton before you set up a tank.
Welso Brain, Open Brain, Long Tentacled Fungia Plate, Various Zoanthids, Trumpet colony, blue Anthelia orange Monti Caps, orange Monti digitata, various birdsnests, various Acroporas
There's always room for more coral!
I dove into this hobby about 2, 1/2 years ago after nagging my wife relentlessly. My other tanks include a Biocube 14 and an Oceanic 76 gallon half-circle.
When you see signs of stress in your fish, you can then take steps to identify the source of that stress and then to resolve it before it becomes a major issue.
If you're looking for a unique way to stock your new tank, give freshwater shrimp a try.
If your fish is suffering, you may want to consider euthanasia as an option to humanely end his pain.