This is a rabbit hole. There are many many ways to get your mic and game pc audio from 1 pc to the other. Analog mixers, GoXLR, NDI, VoiceMeter, over the network etc. There are so many ways to do it, and depend on what hardware you have. I will try to include links to setup guides for each of these options. If you’re completely in the dark and need some base understanding, check out General Info & Guides first and then move onto the options!
Software Audio - Read me first!
Ready to learn about video? Continue to Dual PC Video Methods