Need tips to better my sound



I’m not computer savvy and enjoy the convenience of streaming.
Right now my router goes to my smart TV by ethernet cable. I stream Spotify app on TV through an optical cable to my dac (old parasound zdac) to yamaha integrated(a-s500) to Revel tower speakers.
Would the best Improvement be to get a dedicated streamer such as a blue sound? I heard blue sound doesn’t work with Spotify but maybe I could get Tidal? I have music stored on an external hard drive, but my computer is slow, old and crappy. I enjoy streaming and seeing my music choices on my TV screen. Do I need a computer to utilize a dedicated streamer? I don’t know how to go about improving this budget (ghetto) set up that I’ve got. The only brick-and-mortar store around me either wants to sell me tons of crap  I can’t afford, or Best Buy tells me "sonos".
suggestions? directions? thanks.
128x128labguy
Wow, some rather cynical posts so far.

In any case, OP, I second (third) the Bluesound Node.

The onboard DAC is pretty good-especially for the price- and you can upgrade to a separate DAC should you find the need.
Given you current system, I think it will be a significant upgrade.
Bob
I fourth the Bluesound.  It works with Spotify and the DAC sounds pretty darn good.  If you haven't already, subscribe to Spotify Premium.  When you do, you can go into settings (from your computer or tablet) and set streaming to the highest quality they provide.  If you do nothing, it defaults to a lower quality
Get a Bluesound Node 2i and stream TIDAL.  This will allow you to listen to hi res and to also enjoy MQA.  I liked the Bluesound better played by itself rather than adding a DAC.