@ronboco I strongly suggest using the 866 for streaming as it's better than the Bluesound Node. You're also not taking advantage of one of the main reasons to own an 866, you only need a single power cable and no interconnect cables, other than connecting a CD player/transport. You don't need Roon, I don't have it and won't get it since they added DSP features and screwed up the SQ.
You can download the 866 Owners manual from the Boulder site. Starting at page 4-14 are instructions to connect the 866 to your home network. You'll need an Android or iOS mobile device to pair your mobile device to the 866. That's all you have to do to access and play songs from Qobuz, TIDAL or other music services. Note - once you've successfully paired the 866 to your home network, you may want to use the mConnect HD app to access music services as it's easier to use than the Boulder Controller app.. mConnect HD is available on the App and Play Store.
If you need assistance, the great folks at Boulder will be glad to help.
BTW, shame on your dealer for not knowing and helping you with this. May be time to find a different dealer.