If you have a deep love of music and singing, and believe that a career singing is what you want your life to be than you will want to immerse yourself in learning about music and singing.
Find a voice teacher, classically trained (you must train classically regardless of what kind of music you want to sing), whose voice you like and who has students that love them. Take lessons weekly and practice daily. Take a music theory class and learn, also, to play an instrument (best to choose piano or guitar to accompany your voice). Listen to singers you like. Do not try to imitate them, but try to understand what it is about their singing that appeals to you.
Develop your voice with honesty - don't try to fake your sound, but learn to sing with good technique.
Also expand you mind and experiences - read about the world, go to museums, discovery history at your library in their research rooms.
To be a true artist you must have an expanded awareness of the world and the arts.
If you are interested in opera, you can choose to attend a University that has a Vocal Performance Degree.
Best of Luck!