It is suggested to use painter 1 1 Chinese software to draw directly, and there are such textbooks on the market now. I am also studying. It took me decades to buy this textbook, which is not bad. Only with textbooks can I study step by step. Look at websites such as China Illustration Network, where there are many illustration tutorials, and look at the drawing process of other people's works. Since you have sketching skills, it should be easy to get started, that is, how to use the software.