Ask HN: Resources on how and why these LLM's work

With so many people using LLM's in their daily workflow now (me included), it bothers me that I don't really understand how they work. My knowledge basically doesn't go much farther than "really complicated markov chain" - which of course isn't really what it is.

I use an LLM as another tool in my toolbelt, like an LSP. But when I want to understand how an LSP works, I go look at some source code and I can find out what it does. Or when I want to know how my editor does code highlighting, I go lookup the source code for tree-sitter and may be able to understand it.

I would like to understand the tools I am using. Does anyone here have good, reliable resources about the inner workings of these LLM's that are also understandable for someone not working in the LLM field?