Introduction to Compilers and Language Design

This book is so accessible! You can make a toy compiler from scratch just by reading this.

On this topic, the LLVM's tutorial is also kind of great and if you are impatient, there are also parser generators. If you are really that impatient but still want to write a compiler, I wrote a guide on how to make a (toy) compiler as easy as possible here https://github.com/quangIO/Lucix