I'm going to assume you meant that Copperheads are a good starter venomous snake, mainly due to the fact they're not as potent as the other state side snakes. With that being said it's still venomous and it's definitely not rear fanged. They're in the viper family and have 100% completely functioning fangs and do not have to chew like a rear fanged snake would.
Now hog nose and false water cobras are rear fanged, and are a safer option.
Also another option is the Rufous Beaked Snake which tend to act like a cobra in their behavior and are very reluctant to bite. They're also rear fanged.