To create a new automation, go to the automation screen and tap the "+" button. 

Here you can select which types of triggers can initiate an action. For now, we'll use "Time of Day" to set a time to schedule a time to run our Apple Shortcut. 

Select "Time of Day" as the trigger for the automation.

Add the time of day here. I prefer to send this update at sunrise, have it repeat daily, and run immediately (you will be notified whenever the shortcut task is attempted).

Once you're all set - tap Done.

In the My Shortcuts row, select the shortcut action you made earlier.

Upon selecting your Apple shortcut, your automation will be set. Be sure to set your automation for any time you want. I've set my shortcuts to run multiple times of the day.