Having a dog is not only cool, and very nice for the whole family it will also bring you on an adventure. Most dogs would like to walk outside. And then for a LONG TIME, trust me.
When having a dog you are pushing yourself to get up early take the dog out. Same goes for the evenings and even during the days. The dog needs his exercise.
But more importantly and way more fun is to bring the dog to a forest, dog park (meeting nice people) or the beach. The latest is the most fun but be careful when your dog wants to drink the water. The dog will definitely get sick afterwards.