KISS. Get an all in one streamer/dac. Listen ‘n learn. First step. Hold
A new or used bluesound on the low end to Lumin or Arunder on the high end are such units. A new Lumin T3 or used Lumin T2 will leave room in your budget for audio grade ethernet cables.
Aurender’s are great streamers but alas they do not work w/ Roon.
Roon is an overlay shell software that runs your Ripped CD’s (into flack files), Qobuz, Tital or whatever you stream from and is a better software interface than anything else. But to that you’ll need thier neclues box. It should be calked Pardoa’s box. I was never going to use Roon untill I did.