You have to make it fun for the puppy and that is exactly what it is. A puppy. Fun, fun,fun. Play a lot. To young to expect much and yes it is to young to force fetch.
To much pressure, can ruin your dog right now. It does not have a clue what you expect.
Maybe the drive part will pick up.
I personally believe in taking pup to a reputable trainer for at least 3 months. This will get his obideance training and well on the way with basics. Just depends on what you want.
Even with a trainer the dog may only get 20min. per day of actuall training after airing. Don't over do it. Make the pup want more. Always praise the puppy.