I'm not embarrassed, I didn't do something to be embarrassed back then, like dishonesty or something similar. What I feel is sorrow. Sorrow for all the years I wasted in a non-existent cause, sorrow for failing to live a healthy natural life until waking up, sorrow that I have to learn all the really important things in life now from scratch, in a not-so-young age. Sorrow for starting to look after myself only now, sorrow for learning things in my 30s that a normal person learns, and enjoys, from his adolescence.
But still, late is better than later.