Procedural animation using inverse kinematics

Hey would anyone know a course that i can buy or some videos that explain procedural animations with inverse kinematics?
Specifically about enemies following a target/player

Here is an example of the result i would want, and here is another one
Its not the best example but i think you get the idea

Anything that helps would be appreciated

check out this one: WeaverDev

The main clue would be that the arms / legs / whatever purely respond to changes (like the position / orientation of the body) instead of them dictating what the movement should be.