I would like to level up and learn some topics deeper (e.g. distributed systems, networking, data and storage). But, a lot of time I struggle to find structured resources to follow to go deeper in the topic.
Target audience of the most tutorials/guides (with a very good structure) are mostly oriented towards beginners, I need something similar but for advanced topics. Otherwise, I am jumping from one paper to another, with no clear structure, sometimes it's good, but a lot of times waste of time if paper doesn't bring something interesting.
Can you please share such resources? Could be about any topic.
Start reading the source code.
For “advanced” anything, you have to go to the source.
https://teachyourselfcs.com/ and/or https://csprimer.com/courses/
Basically, prioritize books/textbooks over tutorials/guides/papers until you've mastered the material in undergraduate textbooks.