Starting a saltwater tank

[Aikidoka]

Thank you for the reply. I think I'm going with 75g.

By the way, here's the dimension of my 75g tank: 48 1/2 x 18 1/2 x 21 3/8.

Here's what I have researched so far:

Live rock- Rule of the thumb atleast 1 or 2lbs per gallon

Live sand - same as liverock or atleast 3" to 4" high from the ground.

Lighting - I just bought it off from eBay (cheaper)

Salt - don't know about the dosage for initial setup and dosage every water change.

Water test kit - don't have it yet, don't know which one to get.

What else do I need to startup the tank? Do I need protein skimmer, power heads? Or etc? If I need a filter, I have a good one that's just sitting around and a heater too, so I'm good with these.

I am patience, I don't care how long this tank will takes me to set it up, I just want a perfect tank as a beginner and learn from it.