I don't think an hour per day is unreasonable. Training to exercise the mind, walking, running or throwing a toy to exercise the body. Doesn't take long to use up the better part of an hour. How much exercise a dog needs to tire them out is 100% dependent on the dog, regardless of lines or personal lineage.
Whether the dog is for first time owners depends on two things...breeding and the amount of time the owner wants to spend working with the dog.