Is possible to edit this asset animations?

Hi all, I would like to edit this asset animations:

The idea is to make just a few changes (not complex animations), so the Unity itself would do the trick maybe. Despite known a thing or two about animation, I’m pretty noob about it on Unity. I’m willing to edit this in other program like Blender if necessary too. I need this for a college work so any help would be appreciated.

I had to duplicate the animation clip, drag and drop it into the animator controller used by the character, this way, the edition was possible.