Ask HN: How to Get Started with RAG?

At my job I'm currently hooking up code to the APIs of LLMs. Just some Python and some common sense, really. In my scripts, the LLMs have access to certain Python scripts that call certain APIs to get more data and I put that back into the prompt so it can reason on it (the data is simple enough for an LLM to be able to do that).

And I've noticed there are some projects coming up where people want a "knowledge base". That to me sounds like they need RAG as that's a lot more data and you can't just put that into the prompt/context anymore. But I don't really know much about it other than some basic principles.

So how do I get started on learning how to extend such a system with RAG?