I have a Sunbrite outdoor TV. I currently use DirectTV but want to go to a streaming service. The Sunbrite is not a smart TV. The audio for the outdoor TV currently uses RCA cables to connect the DirectTV box to the wired Sonos amp, which then is wired to the outdoor speakers. I'll have to use a firestick or such to get streaming video to the TV. The TV has a digital audio output jack but the sonos amp just has the RCA inputs. Any guidance on how to do this, preferably with existing components?