I have a cat and she is very little work. I scoop her litter box regularly which takes all of 2 minutes and change it completely about once a week, that takes all of 5 minutes. Her food and water bowls I just keep from being empty so I fill as needed. That might explain her rather large size.

She was some work as a kitten, she needed a lot more attention but I would say her kitten stage still pales in comparison to any dog's puppy stage.
My boyfriend and I both want a dog but every time I am around someone elses dog, especially a puppy, I remember how thankful I am to not have one. They are NON stop and you have to constantly keep an eye on them when company is around because they will jump on their lap, try to eat their food, run off with their shoes, etc. None of this is a problem with a cat unless your cat is really social, then just maybe the cat might try to get in their lap. Even then, the cat isn't trying to jump up and down and bite their face.
Basically, a dog is so much work for someone who has never taken care of an animal, it might be a lot more work than they expect. A cat might be a better start OR perhaps adopt a dog who is a little older. This would be really nice for the dog and you would be past that puppy stage.