The best way to animate an armature 3D model involves a well-rigged skeleton (clear bone hierarchy), keyframe animation for critical motions, and refining with tools like Blender, Maya, or Unity.
First, ensure the armature’s bones are correctly weighted to the mesh—this prevents unnatural stretching when moving. Next, add keyframes at the start/end of actions (e.g., a hand reaching) and adjust interpolation (ease-in/out) for smooth transitions between frames.
Beginners should start simple: use a stick-figure armature in Blender, practice basic bends (elbows/knees), and rely on auto-interpolation to simplify smooth motion before complex tasks (e.g., walk cycles).
This method works for games, films, or demos—it balances realism and editability by focusing on solid rigging and precise keyframing.