Singing is a very abstract activity. Our instrument - voice box/larynx - is inside of our body so we cannot see or touch it. How can we control an instrument that we cannot see or touch? That’s what makes singing so difficult.
Studies show that beginners rely on auditory feedback (how their voice sounds) to control their voice.
We should be relying on our kinesthetic awareness (the sensations we feel) to control our voice.
Two Kinds of Awareness
There are 2 kinds of awareness: