This is your art. Your career. It will often take years of perfecting to get where you want to be. But you will get there.
Branding is who you are. Marketing is how you build awareness.
The purpose of branding is to make a genuine connection with fans - it is their perception of you.
So many talented musicians have have honed their craft as an artist, but have failed to see big success because they lack in other areas crucial for commercial success.