The content of initial experience is sense experience.

To put it another way, initial experience is not any kind of awareness or understanding of oneself’s being, but rather we have this content that is sensory data. At some point we become aware of what the external world and its independent objects are. And only later do we fully realise that we ourselves are an object in something we have called an external world when in fact there is no such thing as an internal world for which to contrast to the external world.

The internal and external worlds are not two separate worlds but one single reality. So the terms are redundant.