I think you should give up on the idea of changing him We can't change the way other people act and think. If he does not want to encourage you to be creative or live independently, you can't change him.

Have you already told him how you feel about these things? What is his reaction?

Would it be possible to live your life the way you want if you were married to him, accepting that he is not going to encourage your creativity? If any of this is something you cannot live with, perhaps it would be better to rethink the marriage?