This Guide will be helpful if you want to do what took me endless nights to do all this without any guidance. Navigating these trenches alone. And trust me. ITS REWARDING IF YOU WANNA GO THAT WAY. But costs you a lot of mental space.
Simple answer:
We are predicting and explaining how atoms interact based on energy, orbitals, and electrostatic fields.
This is not Molecular Dynamics. That thing is different.
To understand how Extraction works. This helps us understand the Binding Energy
$$ \Delta E_{\text{bind}} = E_{\text{Complex}} - \left( E_{\text{Component A}} + E_{\text{Component B}} \right) $$
Here I will be guiding you to install and run some simulations
Simple.