There is a 1940s movie "short subject" named "Cuban Rhythm," that you can see occasionally (in the U. S.) on Turner Classic Movies, that includes a brief (American style) Rumba lesson taught by an Arthur Murray instructor.  The Latin Motion part:  Imagine that you are standing on a street corner, waiting for a bus, switching your weight from one leg to the other.  Of course there's more to it, but it's not a bad way for a beginner to start.