Welcome! First thing you need to do is to get some books on corns, we have two members here that wrote the best books on corns. You can download them or purchase them.
Leave your snake be for about a week, just change the water but don't touch or handle him, let him settle in.
Do you have your temps set with a thermostat? If you need some answers on how to set it up, let us know.
http://www.amazon.com/s/ref=nb_sb_no...20kathy%20love
http://www.amazon.com/Corn-Snakes-Ca...eg+corn+snakes
Until you get the books, ask any questions you have, we will answer them the best we can.
Welcome!