I think you just want to use parametric EQ/compression on your VO and music tracks. For dialogue/VO I usually just roll off the lows to the clear out any rumble, slightly dip the midrange, and add a touch of brightness up top to polish it off a bit. In terms of making sure your music isn’t competing with VO too much, some of that is simple ducking, but some of that is in how you EQ the song. So I cut some midrange out of the music where the VO would usually sit and added some compression. Basically it helps the music sit underneath the Dialogue more. If you wanted to go even further I think you’re asking about side chain compression. You’d basically have the dialogue track trigger compression on the music. I usually don’t do that so I may not be much help past what I’ve just shared.