DISCLAIMER: This is my opinion
It sounds very similar to how I did it. Where is the live rock from? When you got it, was it transported wet? And do you have live sand as a substrate?
If the live rock was in fact "live", you may not be seeing high ammonia levels because there is already established bacteria which is good! This will help lessen the dramatic cycling experience... Especially if you have live sand in there too.
Have you had a diatom algae bloom yet? It's brown sand like lookin stuff... It's completely harmless, but is a good indicator of a cycle nearing it's end. Also a good snack for crabs...
I agree you should add a hermit crab or 2, but not a damsel. They're mean little fishies and are near impossible to remove if you wanted to. My first fish was a clown goby. Something small and hardy but something you see yourself wanting is ideal. So add a hermit and see how it fares for a week or so, maybe even less, and then add a fish.
While you do this, be sure to keep an eye on water parameters before you do add a fish.. I would wait until you do actually see a NITRATE reading... Good luck! Any questions ask!