You can only become a good artist by copying the masters.
Jean-Auguste-Dominique Ingres (1780 -1867)
I draw in museums, studying master works, sometimes over days, to try and absorb and learn what is being revealed to me. This traditional has a venerable history.
Not just Renoir, Delacroix, Matisse and Degas, Ingres and David, but also artists like Raphael and Michelangelo all studied works of the masters who went before them.