Ask HN: Resources for learning LLVM?

Recently I've been interested in learning more about compiler and interpreter design. I've started by putting together a template for projects that use lex and yacc https://github.com/MatanSilver/cookiecutter-yacc

I successfully used that and some articles on writing LLVM frontends, like https://gnuu.org/2009/09/18/writing-your-own-toy-compiler/ to write a compiler for a simple language with a c-like syntax. I was wondering if there are resources or utilities that make writing compilers a more accessible task? I couldn't find many up-to-date articles with instructions on using LLVM (many, including the linked article, use old LLVM API's). The project's own documentation is quite daunting...