I've been struggling with it for years
It's almost like an aspiring writer trying to master grammar and poetic structure then masters both. But the toughest part is to fine one's own voice and offering something to the world that is completely original and one's own. What I've learned so far is do work just for the joy of it, not for money nor fame. Also, don't let critics derail you from your path of self discovery through one's art. I also find reading about artist's lives and looking and their work to find that thread sheds some light on the process. As an artist I don't think this path will ever end, but enjoy the journey.