Open AI, create a new document, and become familiar with the basic tools on the left toolbar, such as pen drawing paths, black arrows to select and move, white arrows to edit points, polygon drawing, etc., and then familiarize yourself with the commands in the upper column. Such as rotation, deformation, blur, path finder, stroke color, gradient, etc. Be familiar with the stack of different color patches, which is the stacking order of the patches you outline. After you are familiar with these commands, you can outline the existing Cut and combine images, and adjust tracing points to achieve the image effect you want. First, familiarize yourself with the software, second, follow the tutorials, and third, do it yourself ~ I wish you success