Question about genres

I’ll try other threads as well but trying to get a better understanding of genres. Specifically how to differentiate hard techno, hardstyle, uptempo, raw style, is hardcore also a genre?

Maybe examples of artist with the genre would be helpful.

Are they always mixed together? Are they sub-genre of one genre?

Definitely love it. Just want to get a better understanding of what i’m listening to, any and all help is much appreciated! Ty