I've never had a corn snake but I have had a milk snake and as a youngster he was very flighty and quick. Holding him was a challenge as he was like a little coiled spring until he got some size to him. I understand many corn snakes are the same way.

My California king snake was chill even as a youngster and is fun to fool with. OTOH my female will still musk even as an adult no matter how much or little she's handled.

Maybe something like a Dumeril's boa would be better, especially if you're getting a real reptile enclosure and not a tank for housing. They have a good food response, don't get too big too fast, and tend to be laid back.