Just a note : 'rigpa' is intimately related to Dzogchen (https://en.m.wikipedia.org/wiki/Dzogchen), a high level Tantric practice common to several Tibetan schools of Buddhism as well as the Bon religion, and thus is a /bit/ more complicated than and definitely not quite the same as simply trying to maintain presence in direct experience.

A more appropriate correlate would be 'sati' : https://en.wikipedia.org/wiki/Sati_(Buddhism)