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
Post removed 
sfseay"Don’t waste money on upgraded fuses. Worst audio advice you can act on."

Will you please advice us what upgraded fuses you have acquired, what Music Reproduction System components you have installed them in and the nature of you’re listening tests that have leaded you to this unqualified, unilateral, and absolute pronouncement?
Update:  I just purchased the node 2i, and will order a year of qobuz for $150 within the week.
Can't wait to integrate these two things and see if I still need the Zdac. Next steps of possible improvements will be room treatments (or better yet, improved integrated with room correction like Anthem STR?) Anyway, I get ahead of myself and I'm pretty broke now so that's it for this month's improvements. I'm working overtime in hopes of slowly gaining improvements. I sincerely appreciate all the wonderful input and experience shared on this post (minimal trolls and jackholes). I really hope you same guys are around to help me with the next step.
Thanks go out to soix, fuzztone, gdnrbob, lalitk, highpeakrider, mr_m, larry5729, and the other contributors that shared experience and knowledge.
If you have a coax or toslink input vacant on your DAC I recommend the Metrum Baby Alambre with Volumio (OR Roon (if you're lazy and rich.)
Email Wouter if you have any questions.
It'll give that BluNode a run for the money, SQwise. Then use the free BubbleUPnP app to control Qobuz. It's better than BluOS. As a bonus it will stream tracks from your phone via WiFi better than BT.
$482 delivered, direct.