Here are some general steps to get you started on how to draw on a computer:

1. Choose a drawing software that you want to use. Some popular ones include Adobe Photoshop, Sketchbook Pro, and Corel Painter.
2. Familiarize yourself with the software's interface and tools.
3. Start with basic shapes and lines to create your drawing.
4. Use layers to separate different parts of your drawing.
5. Experiment with different brushes and colors.
6. Save your work frequently.