Know your worth. Keep it real, but know exactly what you bring to the table as an employee and how much that’s worth. If you don’t know, figure it out.
When interviewing, pay attention to any point of conversation that implies that the role is less than your worth and ask questions. You may dodge a huge bullet.
Musicbrainz Picard --> mp3Tag --> MusicBee
There are portable versions of all three, so you can lock a version in your music directory and never worry about updates ruining your tags.