Question Track how hard GameObject button is pressed

I am trying to create CPR simulation for Quest 2 wand looking for a way to track how hard user is pressing on object (in this case it's chest area). To make my life easier, I was thinking of creating button that can be pressed and hide it inside human's 3d model instead of creating complex rig for model (there will probably still be some basic compression/decompression on 3d model to make it look more realistic).
Basically, I want to do something like this

The caveat is that I need to track value of how hard button is pressed by user (game object, not button on controller), let's say from 0 to 100, rather than just pressed/not pressed state and I'm looking for some pointers.

 

Get the Velocity from the controllers?
You can't really use force when pushing in the air, so velocity/speed or acceleration will probably be used

 

For anybody trying to achieve the same, here's basically what I did. I used button displacement value (newPosition in script) as value for my simulated pressure meter. Then in my pressure meter bar (I used simple progress bar), I inverted values.

float pressureAmount = Mathf.InverseLerp(buttonTopPosition, buttonDownPosition, hb.pressureAmount);

current = Mathf.Lerp(minimum, maximum, pressureAmount);

In my case,
buttonTopPosition = 8.1603f
buttonDownPosition = 8.128f
for button positions and
minimum = 0
maximum = 100
for progress bar
Refer to this post to get a better understanding of code above.


Basically, when button goes down, value in progress bar goes up and vice versa.