Open Krita
Go to Window > Workspace > Animation
Create a new document
Enable the Animation Timeline docker
Enable the Onion Skins docker
Create a new paint layer
Draw the first frame
Add a new frame in the timeline
Draw the next frame
Repeat for each frame
Use onion skinning to see previous and next frames
Adjust frame timing in the timeline
Set playback range if needed
Press Play to preview the animation
Edit frames until the motion looks right
Export the animation as GIF, MP4, or image sequence