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?
Then I would look for linux sysadmin resources, f.e.
https://github.com/shiiaii/fork-david-linux-administration-books/blob/main/Practical_Linux_System_Administration.pdf
Or wait for a udemy offer (Should never have to buy for full price, offers at 13-15 euro comes more often than not) and grab an admin course there if you want video lectures, f.e.
https://www.udemy.com/course/master-linux-administration/