Dual PC audio setup, help requested

[pepitomobile]

Hey friends,

now i read several guides and howtos for a dual pc audio setup and i am totally lost in space now, i am even more confused then before.

i hate my current dirty hack audio setup, and i want something better.

i have 2 pcs, 1 gaming pc with 2 soundcards, and one stream pc with one soundcard and a LGHD, a XLR mic and a focusrite scarlett 2i2, a astro a50 and several other headsets.

what i want is (if possible) - separate the audio signal from the gaming pc in 1. game audio 2. voice com in a mixer, add the mic on top and stream the whole stuff, maybe have the music on the stream pc.
and i would like to use the same mic for voice com on the gaming pc AND the stream on the streaming pc, and the best would to hear game sound and voice com on my headset. music is not so important but would be a bonus.

the thing is i have no real clue to do it, my current plan is to buy a lot of cables and adapters and play try and error, but this is something i would love to prevent

i already ordered a behringer x1204USB because i recieved a really good offer.

i would be so thankful if someone could help me with the cable setup.

thanks in favor