Is it hard to keep a corn ?

[Blue Apple Herps]

No. They're easier to keep successfully than BPs, not that bps are hard.

Any snake can regurge, and any snake can be stressed. There's a reason why corns are probably the most popular 1st snake. They're quite easy to care for, aren't that strict in their requirements, are voracious eaters, not to large not too small as adults, tame, and come in literally hundreds of different morphs and combos.