Can you be a dancer without dancing? Can you be a writer without writing? Can you be a good speaker without speaking in front of others? No! Right?
So, whatever you want to be, do that. If you want to be the best painter, paint paint and paint until you become one. If you want to be the best singer, sing sing and keep singing until you become one. If you want to achieve something your action must be aligned to what you want to be.
Many people dream but only those who act achieve them. It is very important that your every action is taking you closer to your goal. If not then you must immediately check your action and change whatever is required.
Take action for whatever you want to be.