The Bluesound Node is a good way to break ground on getting started. And if you check online, a number of dealers are selling the previous generation for 300 or slightly more. The money you save from the 500 in your budget can go toward a good digital cable, and check around, e.g. The Cable Co for a good used digital cable. Then you can get acquainted with Qobuz or Tidal and expand from there.
good luck