just received some live rock

ok thank you for the advice I think that I will add it to the tank my protein skimmer I got the other day keeps putting tons of micro bubbles into the water is this ok?
 
She has also given me a 4 stripe damsel, I wanted to wait to put fish in but she was getting rid of everything so I figured I would give him a chance
 
what type of fish would you recommend to me to get started out she said that she had four of them to start out with but the one I now have had killed the others
 
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