Note: This page is constantly updated with new material :)
New to compilers?
We recommend starting by going through "Crafting Interpreters" by Bob Nystrom. The books is available for free online and provides an accessible introduction to the topic.
The langjam repo also has some good resources on getting started.
Read some of this papers listed in https://c9x.me/compile/bib/
Highly recommend studying the architecture of existing open source projects. It will help you get better at navigating large codebases and will give you a sense of what techniques the industry is using.
The Architecture of Open Source Applications has a good list of codebases to study. Let your curiosity guide you through most of this process.