Is there an example mod I could use to learn how to use this? Planning to use this for my modfest entry

uh- well,
In this project, there is a testmod

The project is implemented in emotecraft and Better Combat

BetterCombat implementation is much simpler... (emotecraft is a huge multi-module project, hard to understand that.)

Originally I started the animation library for Emotecraft, you might find how-to animate guides/tools there:
https://github.com/KosmX/emotes/wiki/Animation-in-Minecraft
Blender and BlockBench models for emotecraft animation library

If you want, you can contact me on Discord: KosmX#7620

There are some example mods for Fabric and Forge. See updated README for links!
https://github.com/KosmX/minecraftPlayerAnimator#example-mods