Let me share just one more tip with you then. It was really an ice breaker when I could not find the answers on how something should work.
You go to github.com where Godot code and many other godot projects are and you use github's search. For example, when you want to see examples of how to use SamplePlayer, you search for:
Github will let you search within: Repositories, Code, Commits, Issues, Wikis and Users. You of course click on Code in the upper search summary menu... and voila, you see all the places in all projects written in GDScript that are on Github, that use SamplePlayer in their code. You may even download each project and run it in Godot to see how the code works.