Once here you will be shown many different files but I would always recommend installing the latest one available which should be shown at the top of the list.
The next step is VERY IMPORTANT and is the reason why a lot of people have issues when trying to install the mod. Without this the mod WILL NOT RUN.
You will need to install a mod called Gecko Lib which is used by a lot of mods for their animations. This mod can be found here. This link will take you straight to the 1.20.1 version of the mod and again install the latest one and then put both mods into your mod folder.
Frequently asked question:
Q: Does it support voice chat?
A: The mod does not officially support voice chat yet however if you have the knowledge on how to make an addon for it then please feel free and post it in the discord