'Sssssup Bill? Glad to have you aboard and welcome to AA!
I looked at the Uniquarium on the net and it does look interesting. All self contained. The first thing that concerned me was the pics of the bio balls in the rear compartments. Thoses things work nice at first so I understand - by holding on to that good ammonia consuming bacteria, but later become a problem. Wondering out loud if they can hold small pcs of live rock rubble instead. Much better IMO
I'm sure the components (heater, skimmer, pumps, etc) are the proper size for the setup, but ya gotta find out what kinda lighting you have first of all. The success of a reef depends on it. Fish only is another story. Almost any low powered light will do, but it won't be as pretty either.
The live sand. Is it new, in a bag? Dry, in a bucket or the tank? Under water, without pumps on in the tank. If either way, it's not "live", just has the ability to become seeded with live organisms again.
The best thing you can do right now IMO
is get you a copy of Robert Fenner's "Conscientious Marine Aquarist" book and give yourself some time to absorb that first. Older book, so ignore the part about cycling the tank with fish, but the rest is a good beginner's reference.
The, get a handle on your equipment specs and know those. Let us know more when you can, and get that info updated on the "my info" tab so we can help yu out better.
Good luck! And go slow. It'll pay off.