Not op. But…
On Linux I set up OBS to capture my game window and from obs you are able to set the captured screen as a webcam stream.
On Linux I had to install some stuff to get a restream of the audio. It looped the game audio into a virtual mic.
So…
I Jitsi I just set my mic and video to the appropriate obs-made virtual cam and mic.
My upload maxes at 10mb/s
So I didn’t have the best luck with Jitsi. Definitely not full screen quality.
But OBS might come in handy if you find another way to stream.
OBS I believe is available for windows, Linux, and Mac.
CPU cores. I think the i5 6500 was my lowest option ide get. I believe it has 6 cores?
I didn’t look into i3 at all though.
I also looked for the one with the best USB speeds.