https://answers.microsoft.com/en-us/windows/forum/all/windows-7-to-windows-10-without-data-loss/c1c17508-9775-4971-b856-0977295402cd
One simple google search.
The correct forum section would be New Builds and Planning, I'm sure someone will move this over.
All seems good, the 2060 is a decent card and the CPU will be doing the hard work of processing data for Twitch so should be all good.
Well if you've tried that, and more, it sounds like a mobo issue as you stated nothing is coming up from the motherboard.
Have you tried using the power button on the motherboard if you have one?
Very little information about your issue, what have you tried so far?
The switch on the PSU in the on position?
Did you hook up the case power button correctly?
Are both the 24pin and 8pin cables inserted correctly on the mobo?