Try Some out for Yourself
This is perhaps the most important tip to stress: To understand shortcuts, you’ll need to actually use shortcuts.
Just download one that appeals to you and try it out. You can’t go wrong really, and you won’t get comfortable with the system unless you experiment with it.
The “Say Cheese” shortcut is a great example available in the official gallery. Just download it and try it out. When you run the shortcut in the actual app, it’ll take a picture once you tap “run.” But you can tap the three-dot icon and the slider icon to set it to a Siri voice command.