The server tutorials cover the fundamentals like requests and client-server communication. I would start there.
The Google Cloud tutorials cover one specific way of deploying a server (using Google Cloud), but to understand what’s going on, you should probably get a good handle on the fundamentals first.
That being said, you could start with the server tutorials, learn the basics, and then use the Google Cloud tutorials when you’re ready to deploy to a live site.
Oh, I’d also recommend familiarizing yourself with HTML before jumping into server-side code:
I hope that helps! Let me know how it goes!