The coral is easy, when your water is all good and you have lights needed then its just a matter of picking out ones that you like and putting them in the proper location in the tank.
Since you just started I would add livestock slowly. I generally add a small cuc (cleanup crew) first then add a fish or two. If youre after clowns they might be a good first set of fish to add.
With my SW
fish I temp acclimate for a good 20-30 min then put them into a separate container to which I add tank water every few minutes for about 2 hours. If the water fills up the bag/container then just dump some and keep adding. You want the bag/container to be mostly your tank water when you move the fish. And never ever put the fish stores water into your tank, just net or scoop the fish and add it.
Thats fish adding 101, carey style LOL
When I add inverts like shrimo I usually go for over 2 hours as they are very very sensitive.
Hope that helped.
As a side note, in my FW
tanks, I float for 20-30 min for temp then do the same thing with a container but only do it for about an hour. I havent lost a fish yet due to bad acclimation in any of my tanks. I may be going overboard, but better safe than sorry