Need Some Advice

[Skinner]

I am new to the hobby and was looking to ask a couple of questions. My tests read - Ammonia 0, Nitrite 0, Ph 8.2, Nitrate 20ppm, Phosphate 0, Calcium 400ppm. Now I think I am ready to put something in the tank. What should I add first? How many inverts and or fish can I add to my 90gal tank for the first time? I do eventually want to add corals and I have the right equipment to do it but I think I should wait until I have a mature tank. Now how do I go about bringing them home ( 3hrs away)? When I get them home what is the best way to add them to my tank? Thanks so much for any info this is the best site ever.