Animation not working with the script I placed into it

This is my first time making a rig that does not have a default human template, and I gotta say, it’s difficult.

Here is my model: Craberal.rbxm (21.4 KB)

The issue is, I added an Idle animation to it and the only animated part is one half of the leg (Yes, I ripped the script out of a (updated) Drooling Zombie model) and the entire rest of the body does not move at all

I do not think it’s something with the hip height, because I had issues with the rig sliding all over the plate.