This is how I went about it. I noticed my emotions getting heightened - grief over a passed colleague, anger (the whole fake warrior badmouthing dream thingie that I had pretty much ignored for a long time), and some irritation at small things my GF was doing.
While listening to the audio, I called forth for these emotions to present themselves and they do - sometimes as emotions, and other times as energy, bodily sensations, sort of heaviness in various parts of the body etc. While listening to the audio, I pay attention to them and these seem to get released.
It does take a few cycles over a few days is what I’ve come to understand. Also, when you go to get the vaccine, do not forget to wear your shielding tag (like one would when going to any crowded place like a hospital, etc.)