Ok. One thing is a must in this hobby. Patience is key. As far as looking for info, you came to the right place, i dont know your lfs there but most ive heard about tells you things to get you to buy. By all means please check other sources before biting the bullet. As far as equipment. A skimmer is a huge thing in our hobby. Always buy a skimmer that most puerile would think is overkill for the tank. Ex. You have a 150 gallon tank, get a 200 gallon capable skimmer. Next thing is going to be lighting and flow. Lighting all depends on your preference. I go with led, can be costly but in the long run it pays itself in the end. I have sbreeflights. I love them and they grow coral very nicely. Ocean revives are another option. For the more pricier ones, there is kessil, hydras, and radions. All work well. I just don't want to fork up 1000$ for a light when i can get sbreeflights that cover more if the tank for much less. As far as flow goes i run jeabao rk4. It work for my tank. Your main goal for flow is to have enough to get to all the crooks and crannys but not enough to throw sand around. After getting coral you will be able to adjust to what they prefer. The next thing would be to chose sand or bare bottom. I use sand. I prefer it because it looks natural and does give a good bacteria population for my tank. Then the live rock comes into play. You can either get live rock or dry rock. Dry rock is less expensive. Once u get everything together your gonna wanna aquascape to your liking. Your going to need a heater as well. I like the titanium heaters that have a controller. As far as salt water goes. I suggest mixing in buckets so you mix all the salt and then add the aater to your tank. Once you have a decent ammount of water in the tank you can adjust salinity. The best way to do so is get yourself a refractometer. Your goal would be 35pt or 1.025. Once you have the tank setup and water in it, its gonna start your cycling process. You can either start it by putting a small chunk of food in and let it decay or you can go buy PURE ammonia and dose a little bit of it. You can then add live nitrifying bacteria if desired to get a boost at starting rhe bacteria population. What will happen is the nitrogen cycle. You will start with ammonia which will be turned into nitrite, then to nitrate. It will not be overnight due to the lack of bacteria when first started. You will want test kits to check the levels. After a week or so you will see your ammonia drop to zero, your nitrites rise and drop to zero as well. Essentially when you dose ammonia to the tank you are watching for the ammonia and nitrite to be consumed and at 0 overnight. That is when you can add your first fish. But remember to go slow so the bioload can keep up.