The b350 board need an updated bios to run the 2200g.
What is the psu model, there are a lot of junk 80+ psu's out there.
Is the ram 2x4gb or 1x8gb?
It can stream, sure, keep it at 720p 30fps. Many games are now utilizing 4+ cores, so depending on the game streaming may be difficult.
If the psu is decent, you can pair with a rx570, gtx 1650S/1060 or similar