Do your self a favor and buy a 20g long or 29g tank, an HOB
skimmer, and a cheap flourescent light fixture. No sand, no rocks (well, maybe one sacrificed for the QT). PVC
pcs for hiding. The rock for the tang to feel he has something to hide behind.
As you're just starting, it'd be a good time to set up a QT as you add new fish. It can serve as a hospital tank also if you ever need meds too.
You might get lucky and never get/introduce anything like ick or velvet to your tank - - - but if you did, you'll sure wish you did heed the QT advice. Nothing like a tank full of fish, rock, sand, and healthy inverts only to introduce a disease that will tear your tank down for you.