I am fine with the basics (e.g. classical vs rock/punk vs pop based on instruments) but there’s loads of other terms that aren’t very intuitive.
What is the difference between “alternate” rock and I guess “regular” rock? What is the difference between rock and punk? What is post-(insert subgenre here, like punk)? What is pop rock (the music subgenre, not the fizzy candy rocks), and how is it different from rock pop? What makes music “progressive”? What on earth are the “blues”? What is the difference between rock, metal, hard metal, heavy metal, etc. aside from an increasing level of angriness and decreasing level of clarity? etc etc
The labels and categorisation of everything can get tiring, and be utterly useless or confusing for anyone unfamiliar with a particular genre (it all sounds the same!), however these can still be handy when you find a particular sound you like, you can use that to discover other bands with similar sounds or style.
As bands in that genre experiment and evolve their sound, they may cross, mix it create all new genres that can lead you down a new list of bands to explore - or perhaps it’s not your flavour so you stick with what you like.
Most hobbies have depth to them like this, I guess music is so variable that we need a thousand ways to describe all the various possibilities.