No matter how much practice you have or how good your vocal coach is, there is no guarantee that you will be able to win Eurovision. The fact is that some people are born with a naturally great singing voice. The shape and size of your vocal cords play an important role in this, but so do the measurements of your mouth, throat, and nasal cavities. These are the body's natural resonators, which means they can help improve the tone and intensity of the voice.
This is what creates the distinctive nasal tone of some country music stars and the most breathable voice of Marilyn Monroe, for example. You may not be able to control the natural tone of your voice, but you can adjust the style by using particular resonance chambers on your body. For example, if you want your voice to have an airy quality, try directing the vibrations towards the back of your mouth. If you ask most people, they might tell you that we have to be born with a wonderful voice in order to enjoy singing.
They will tell you that if you want others to appreciate what comes out of your vocal cords, you have to “be born” with a great sound. Born singers are those who know how fun singing can be. They realize how long, difficult and tedious it can be to sing properly, and they do it anyway one day at a time. Attitude takes you very far.
If you haven't perfected the range and vibrato at age 10, but you're still striving for it, you're on the right track. And perhaps, being able to accept constructive criticism (positive and encouraging diagnosis of vocal problems) about your singing is more precisely a sign of your maturity than of your ability to sing. Singing can be so emotionally and mentally elevated that it feels like you're on another plane of existence, or out of your body, while you sing.