I'm another person who doesn't want to sound like a d**k but you need to slow down and research, research, research. I see you work at a fish store, but depending on which one that might necessarily be the best place to do research. Almost all my bad advice came from well meaning fish store employees. A Tang is too big for your tank let alone Tangs. Most Angle fish are notorious for eating coral.
I have no idea on the type of equipment you have other than the size of your tank but a tank 1 month old is not the place for any corals (especially hard). You need to finish cycling and stabilize before you even consider introducing an easy to care for soft coral (3-6 months from now IMO).
If you want to eventually have hard corals growing in the tank you will need a calcium reactor. Even if you do have one now I doubt it is dialed in perfectly after only a month.
You were having problems affording a heater and if you don't slow down and do more research you will be broke and out of the hobby in under a year.
Trust me no one here wants that as the more people in the hobby the more people to trade frags with.
Remember the Ocean wasn't created in a month!
Good luck