All of my snakes eat frozen thawed mice, so I heat up the mice in hot water, put the snakes in each of their small feeding containers, and drop the mouse in. Sometimes I dangle the mouse in front of them with tongs and they will strike and coil around it.
Because your baby is new, I would feed him in the evening in a small container. Leave him alone with it in a nice dark, quiet place for about an hour without peeking. Baby corn snakes are often shy because they are prey to a lot of other animals in the wild. So for the first few feedings with you, he will probably want to feel completely alone and safe before he eats.