My precise recommendation here is a theatrical reading of Eliezer Yudkowski’s HPMOR read/produced by fans and published as a podcast. (I find it a little too slow, so I play it on 1.5x speed).
I just looked in my podcast app and it didn't seem like it would be easy to find episode 1 and play in order. So maybe check other options at this website (like downloading it), but don't get sucked in by some other things they've produced by accident:
The original was published here: