Aren't there any basic guides for using google apps, eg. Photos?

[AC Question]

Please, just a one or two page beginner's guide, Sheesh!

 

[Rukbat]

Not for Android (or the apps) itself, as far as I'm aware, and the manufacturers don't supply any. Which is why we answer questions here.

 

[Count Chokula]

Please, just a one or two page beginner's guide, Sheesh!

Google just so happens to have a tutorial section where you can get instructions on how to use each of their apps. Voila:
https://gsuite.google.com/learning-center/

Seek and ye shall find.