Can of worms and some great advice above. If you upgrade to not using your phone as a source (dedicated streamer) and upgrade the DAC and cables you will be rewarded. And how
A used LumimT2 is one such all in one device. (It supports native Amazon HD) it’s a great price point for what you get. Separates also great but will have a higher entry cost.
Also try a free Qobuz trail.