corals do not have feet, so they won't move around. When you go to your local fish store, most of the corals will come on rocks already. In my experience, you only need to temp acclimate a coral. Put the bag in your aquarium with the lights off for about 15 to 30 minutes. Then, you should take the bag out, take the coral out of the bag and place it in your tank. Do NOT add water from the bag to your aquarium.
Good luck and happy reefing.
btw, what are your water parameters and lighting?