What are the main differences between pipewire and pulseaudio? Which one is better? What are other alternative popular sound servers besides these two?

  • Not directly answering your questions:

    https://wiki.archlinux.org/title/PipeWire
    I’m bad at describing so take the Arch wiki page.

    You don’t really have to worry about configuring much, it should be fine to install all the packages, maybe enable some services, and forget about it.

    It’s likely that you’re not using Arch, so you’ll have to check your distro’s repos for the packages.