Here’s a really good site I found on English dialects: International Dialects of English Archive. You got everything there from South African to Yorkshire accents, to the oral histories of 80+ year old Holocaust survivors.
If you’ve been looking for something to teach you the various english accents of the world, you can do a whole lot worse than this place. I heartily reccomend it. I spent hours here listening to various speakers, it’s fascinating.
Now, if you’ll excuse me, I have to go practice my Welsh so I can pretend to be Christian Bale’s cousin.