Eesh... that's a lot in so little time...
I'm surprised that no one has really mentioned the crushed coral (other than the post above.) Although, looking at the tank with all that LR and reading the list of current inhabitants, you may be in troubleif you wanted to switch to live sand, which is most often better than crushed coral.
We bought CC when we first started, and thankfully that and the salt mix was all we bought at first. I had a chance to drain the tank, scoop out the CC and replace it with LS. Haven't looked back since. Even in the short time we had the CC, I was not happy with it, especially the more I read about it.
Of course, as with anything, you'll hear all different sides about CC vs. LS, but most people are in favor of LS. CC, because of it's texture, is very hard to keep clean, you can't have certain fish or invertebrates, and it is a nitrate trap. Definitely do some research here and on other SW forums, and decide what is best for you and your current/future inhabitants of the tank.
I know it's hard to be patient, but that is the key to this hobby and lifestyle.
Best of luck to you!