Cant figure out how to use XR actions.

So a couple days ago I began creating an XR game, so far I have basic XR stuff (XROrigin, and XR contollers) and IK animations for the hand.

Now today I have decided I want to work on movement, so I heard about the OpenXR Action map, and I was going to use the actions in there to figure out movement, but honestly, I have no idea how it works.

I've read the documents but they dont mention how can you detect when one of these actions is triggered.
I'm not sure if you just cant detect that, but from my reading of the document I couldn't find anything on the subject.
I could go and use the already existing thing out there called XR tools, but I would much rather make something myself and learn from the experience.

So does anyone have any ideas on what to do? Any thing is appreciated!
Thank you!