+ a few corals = Reef....and thus starts the addiction.
As for WPG
for lower light corals you would want 3-4 wpg
. Most shrooms
and leathers will do well. Take a look at "my info" most of the corals I have would do well under those conditions and are considered starter corals. Yes location of corals does matter, but you still need to have plenty of lighting to start with.
I would try to stick to one tang especially if going with a larger species like a Naso.