I agree with others. Pick up a copy of Kathy Love's cornsnake book and read it cover to cover. Then get your tank set up and just let it "run" for several weeks to make sure that everything is in 100% order. Then, and only then would I suggest another snake. Just don't be in a hurry, what's another month or two of learning and getting things right if it means 15+ years with a healthy, happy snake?

Good luck.