As far as connecting analogue outputs to your receiver that’s simple as stated above.
How you do streaming with the R26 is an interesting question with a few answers. Many people use different solutions with great results. The R26;is very flexible and has multiple options.
1. Connect the Ethernet cable to R26 and use the R26 streamer. Do this and you see a ‘gustardrenderer’ on the network that you can connect to with some streaming software: JPlay on IOS is great but you have to pay, mconnect on iOS is rubbish but free and works, there are other options if you are using a laptop.
2. Use an external streamer and connect to R26. Plenty of options here, most cost effective is probably WIim mini connected to R26 via toslink. This is cheap, software works very well and reliably and sounds great.
3. Connect your phone /computer directly using usb. If this suits your layout then try it, it’s not suitable for my listening but should sound fine.
Give the R26 a chance, it’s very flexible, extremely well made, and sounds great (IMO).