Hey there, we would love to provide you steps on how to quickly setup Passthrough. You'll need to enable it by:
Once enabled, you can switch into Passthrough by tapping either the left or right side of your headset twice. Keep in mind, you just need to tap the side of your headset, you aren't pressing any physical buttons to enter Passthrough.
We will also provide a link here that shows you steps on how to set up the passthrough using the Rift S.