https://www.playstation.com/en-us/explore/ps4/

Learn how to pre-order digital PS4 games from the PlayStation Store. Then learn how to set your PS4 to automatically download pre-ordered games so they'll be ready to play on the day they're released.

Check out this article to learn about deactivating the primary for your PlayStation Network account: https://support.us.playstation.com/articles/en_US/KC_Article/Activate-or-Deactivate-Primary-PS4
Check out these videos to learn more about PS4 downloads.

To learn about PS4 Downloads, visit https://youtu.be/ZdJ6pir9lGc
To learn about PS4 Automatic Downloads, visit https://youtu.be/MoRhQDFCR9E
To learn about Troubleshooting PS4 Downloads, visit https://youtu.be/KLGyk1Dhp1g

...