Why is my Input Action window not the same is in the documentation?

I was trying to follow a tuturial on how to use this new input system, but I just got stuck when trying to setup my actions. The window to edit actions is missing some functionalities compared to the documentation and to online tutorials...
6446776--721705--upload_2020-10-22_21-8-11.png
As you can see I don't have interactions available in the Properties tab...
And my properties gets completely empty if I click on an action ("Movement" on the image), or any binding or composite ("ZQSD" on the image), which was not the case when I looked up for tutorials :(
I don't know what's wrong...

Oh and also I don't seem to be able to choose a key/button by listening to the input:
In path, I had to click the text buton and press the letter z, otherwise I had an empty dropdown button which didn't trigger anything.

I also realized the name of the window should most definitely not be "Unity.Engine.InputSystem..." but rather the name of the file being edited which is called "Controls".