Play Music From PC To Google Home

If you haven't done so already install VLC : https://www.videolan.org/

Locate an Mp3 file, right click on the Mp3 file then select Open with, then Select VLC media player.

If you would like VLC to always open when playing an MP3 file then select Choose another app instead.

Now select VLC, then tick Always use this app to open .mp3 files, then OK

Once VLC opens click on Playback, then Renderer, then select you Google Home device.

This may say scanning as it detects the devices on the network, give it 20 seconds or so.