Find out what you really feel called to do in the Arts.
And then work as hard as you can. But even then, never stop experimenting.
What kind of artist are we talking about? Do you sing ? Dance? Paint? Draw? Write?
If you have these talent then you are already a artist, but to know for sure start doing. Pick up a pencil and write, write about your friends, tell your stories, take a pincer and draw anything see how it comes out, something with painting. Danceing take classes, singing join a singing group, sing in church. This will show what type of talent you have.
Me I write, paint, draw, sing, dance on my own. My talent of being a artist was not known to me until I tried each and everyone. You want to be a artist you already are just fine out what type of artist. Do start now.