Earlier quoted context omitted.
Trying to learn to become a developer from tutorials is like trying to become a carpenter by reading instruction manuals for saws, nail guns, &c. To learn how to implement computer programs, read books about it.
We might have different ideas about what constitutes a tutorial. Online tutorials vary massively in quality, but something like the official Python tutorial https://docs.python.org/3/tutorial/ is a fine resource. I would even say that the categories are not mutually exclusive - I would call "Structure and Interpretation of Computer Programs" both a book and a tutorial. Different people probably find different resourc…
You need to start by reading somewhere, or you'll probably not get anywhere, as evidenced by pretty much zero office grunts using web browsers every day having figured out the JS console and application development on their own without reading about it. I recommend books over tutorial texts.
But yeah, as I alluded to, you need to build stuff and learn from other builders.