Start here. I can find my sunshine settings and send a screenshot too. The key for me was getting it to work over the internet securely. I ended up creating my own vlan with zero tier one. It installs like a vpn on your mobile devices and when you connect to it, all your devices work like they are on the same network. (Sorry if you already know how this works). I trust it more than any other internet streaming and I have to manually approve each device that connects to my network.
The thing that got me was you have to use the IP address of your pc as the server name for moonlight, not the name you were using with gamestream.