There is quite a bit more to it, distributing sound in time frequency and space, sidechain effects that apply changes on some tracks depending on the sound of other tracks (one super common example is to silence slightly instruments to leave room in volume and frequency for a kick or drums in general). Frequency splitting, parallel fx chains. It is a bit tricky to automate and is really based on a feeling as each person doing the mixing will have a different vision and experience, and every song will have a different frequency/space/time complexity even in the same genre. But most advanced DAWs with integrated collection of effects like Live or Bitwig will have presets that you can start to build on. (I have not tried reaper for that, that's on my list)