Yes, the use of the term "mind" is suggestive of an observing self. 

And yes, I wasn't aware of any other reality within the confines of my current physical body along with its mental functions. The singular inner territory within me, stood on its own. 

I was just in myself so yeah, it was relational only to me.

This stuff is way more real than ordinary bodily/social existence.  What else might lie beyond or within this, awaiting discovery?