Good example of a network diagram with multiple sites?

I'm looking to build a network diagram to show to some members of my team but networking isn't my area honestly, programming is. I'm trying to just find a good example with some details showing multiple sites being connected to a main "HQ" site along with all sites being connected to the cloud - I'm trying to find how the router would interact with firewalls and these sort of things, any ideas of the best place to find examples?

edit: https://www.silver-peak.com/sites/default/files/images/what-is-sdwan/SD-WAN-diagram-s.png I would use this as a basic example but I'm trying to find a much more detailed example to build from