PrBoom Questions

1.) How do you install this correctly? I loaded the core and then the wad for Doom and got a content failed to load message.

2.) I read that the core does not support the music of the game natively and that I need mp3s. How does this work?

3.) I also read that PrBoom does not support netplay. Does it support any other sort of multiplayer?

This should answer 1 and 2: https://docs.libretro.com/library/prboom/

It doesn’t support any multiplayer currently, no.