https://docs.microsoft.com/en-us/troubleshoot/windows-client/networking/10060-connection-timed-out-with-proxy-server
This is a WINDOWS error, not a PLUTONIUM error. Read the link above.
Probably not. Port forwarding and / or hosting a server are pretty straight forward already.
We may overhaul it eventually but for now the server creation and private match stats show that plenty of people are following the instructions without a problem.