MediBang Paint is an easy-to-use painting and drawing app that is available on both mobile and desktop platforms. It includes a wide range of features to help users create high-quality digital art, such as a wide variety of brushes, customizable canvas sizes, and a range of tutorials to help users get started. MediBang Paint also includes a library of free artwork, which users can use as inspiration or incorporate into their own works. The app also allows users to collaborate with others on projects, share their work with the community, and access a range of helpful resources such as stock photos, tutorials, and more.
Krita is also a free user-supported paint program and I've seen people draw comics with it.