ionent

Similarly, I quit my IT job a few years ago to go to music school. I also found that book and ear training very useful, especially if you're interested in improvisation. One thing I'd add (for improvisation) is to not only be able to identify, but to sing those intervals, triads, and 7th chords as well (ascending, descending, all inversions), and also do the same thing with scales/modes. If you can sing them, you know you have the sound internalized.