Low-level means different things to different people: 1. The best source of low-level information on things like operating systems (writing your own) etc is ht

Low-level means different things to different people: 1. The best source of low-level information on things like operating systems (writing your own) etc is https://wiki.osdev.org/Expanded_Main_Page https://wiki.osdev.org/Expanded_Main_Page 2. Compiler related low-level should include a read through Crafting Interpreters (https://craftinginterpreters.com/ https://craftinginterpreters.com/), even if all you're going to do is create compiled languages. 3. Hardware type low-level (where you build your own logic) is a long and ultimately non-rewarding path. I would suggest https://eater.net/8bit/ https://eater.net/8bit/ All those links are only starting points; use them to find a direction in which to head. [EDIT: I also recommend writing a eBPF module for linux - easier than writing a kernel module, with just as much low-level hooks as you might need].