Terminology & how to structure all locations

Hi - is there anywhere I can see definitions of the terms used in openEMR - not being in the US, I am not sure the terminology means the same things to me - e.g. Facility vs. Practice vs. clinic vs. location
I’m also a 1st time user of openEMR.

The context is for a company that provides thermal imaging services:
(I’d also appreciate suggestions on the initial setup)

  1. Head Office. Most of the admin, but also provides services
  2. A number of part-time (similar to mobile?) clinics at different locations. A couple of technicians (is a technician a provider?) travel between the clinics to provide these services.
  3. A couple of full-time clinics.