How do I create an introductory animation in Unity, pls help

How do I create an introductory 2D animation in Unity for a platformer game where the character emerges from a pile of corpses, walks to the right, finds a corpse with a sword stuck in its abdomen, and pulls out the sword before the player takes control of the character?
Can you provide a link to documentation or video instructions for creating such an animation?

I would recommend looking into Unity’s Timeline feature:

This is essentially a way to create cutscenes. You can probably find some examples on Youtube about the Timeline.

You could also manually move the character around and play the appropriate animations via script, but the Timeline may provide a nicer interface.