I am a Baritone, I have been singing with a vocal coach for about a year now and about 3 days ago I finally discovered my mixed voice (yay). It is incredibly weak but I can sometimes push it up to a High Tenor C.
My highest note in chest is A# on a good day with the wind behind me, but when I mix higher than this, often my tone is very raspy, and can flip into a fry-scream sound.
How can I improve my mixed voice to sound brighter and cleaner, without distortion? Is this just going to improve with time or am I doing something fundamentally wrong?