You will want to check your salt levels of course hehe and temp to see that things are okay. Tell us about your tank, what did you end up getting? Where did you get it.. people here are dien to know!
The nitrate and Nitrite will exchange levels as the tank developes and cycle (Right?), but to get things started you might want some live rock in there as well. I personally didn't buy a testing kit till about a month and a bit in when setting up my tank. The longer I waited the bette. I'm not good at the chemistry aspect, but for about a week when i did start testing I was seeing slight differences and then one day i had a huge jump and things were looking up. trail and error on the testing will help you grasp it a little better.
I'm not nearly as experienced as most on this website but i just started my tank 6 months ago in calgary.
You can take my suggestion or leave it but I would suggest removing the sand for now if you can. for starting a tank its good to know where the waste collects and how much the tank produces. If removing the sand isn't an option or you rather not part with the look make sure you are mixing it up while you wait. Sand tends to trick you in thinking the tank is clean when its really dirty and thats going to effect your testing
