In the next part, I hope I can write a kernel from scratch, haha.

Grab Tannenbaum's "Operating Systems, Design and Implementation" - aka "The Minix book" - you will LOVE the book, and walk away having an genuine understanding of what's going on under the hood in a kernel, and be able to write your own

Amazon link https://www.amazon.com/Operating-Systems-Design-Implementati...