I have been using Linux as my daily driver for quite some time (around 5-6 years) and usually manage to get whatever needs to be done. However, I now wish to learn it in a more structured manner, which includes understanding utilities and the workings of Linux. What resources should I look out for?
Honestly, this is the best way to learn almost anything: Start a project. When you don’t know how to do something, look it up. Repeat until you die.