Singing is a passion and, like all creative pursuits, involves much soul searching, questioning, giving up, and starting again. Rarely is it plain sailing and it takes many years to find your sound... and yourself. It is this desire which will propel you forward to exceed your expectations - if you can endure.
Charlie Parker (jazz saxophonist) said:
"If you don't live it, it won't come out of your horn"
and I guess that can apply to musicians and non-musicians alike:
To express yourself, you have to live your life - not imitate or pine for the lifestyles of others.
BTW, KPOP is an industry where singers are secondary to purpose and often bound to inextricable contracts. Have a closer look beneath the facade (really study their faces) and determine if they are truly happy.
"Music is spiritual. The music business is not." (Van Morrison)