https://www.domestika.org/en/courses/134-2d-animation-with-photoshop

 Animate a 2D character and create an animated avatar in GIF format frame by frame  In this Domestika course, the Llamarada Estudio team -specialized in 2D Animation and Motion Graphics- will teach you to bring your illustrations, photographs and stills to life thanks to Adobe Photoshop.  You will discover different techniques of animation, composition and visual resources that you can apply in animated GIFs.  At the end of the course, you will know in depth the possibilities that cel animation has (or frame by frame), its advantages, its scope and its complexity and you will be able to apply this knowledge to many other projects.