DISCLAIMER: I'm certainly not an expert on food and drink, so it's possible this series and the 'experts' involved don't know what they're talking about - and of course food and drink almost always includes matters of opinion.
That said, I've found this series of short "Expert Guesses Cheap vs. Expensive ......" videos pretty interesting and informative as an introduction. Thought I'd mention them here.
Here's the video on differing coffee types, but the one on meats was where I started.