What are the methods of starting a work of art?

Generally speaking, there are three kinds

1. Direct sketching method (provided that you have the manuscript of the book, or painting, just directly traced on rice paper)

2. Enlarged copy method (you do not have a manuscript, only the picture, you can now enlarged the picture to the required size, and then use the copy paper, traced out the manuscript)

3. Direct shape method (against the picture, the enlarged sketch, but high level people can only directly draft, beginners are not easy to master)

3.