Yeah everything looked good except ammonia.....if this is the beggining of your cycle then you have a few weeks to go probably.
I've never heard of a burr fish I guess. Do you have any info on them? It could be a fish that I know by a different name since there are SO many common names for everything in saltwater.
I never run my skimmer for a few weeks after it has cycled because it can be wasteful as there isn't enough for it to skim.
About your damsel idea. They can be little jerks so it depends on what exactly a burr fish is. There are several other small fish you could look into. Also look around for a cool rare damsel. The blue ones and the blue/yellow ones are pretty common and sometimes it is fun to have something rare. Some of my favs are the domino's and the convict damsels. I also saw a cool looking blue/orange damsel the other day that was really cool. There are a lot of damsels out there and it is fun to have a damsel if you can get a good one.
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Clint
CDevoe1111@aol.com