You are accessing your subconscious mind fairly instantaneously. In my opinion, a scrying mirror is merely a medium for you to project your consciousness on to, stirring the subconscious and projecting this on t a medium will cause the perception of various images.
Some will argue this has use alone, others will state this is a preliminary step to accessing something greater, which for the sake of ease, could be labelled 'the collective unconscious'.
Really and truly, I don't know your experience, your technique, your history of practices, and can't comment on what you are doing, or even what you are experiencing. I think what matters is, you are experiencing something, over time these experiences may change. Why something is occurring should matter little to you.
I say this because, magical practitioners do not agree on anything. One person's explanation will not be another persons. Carry on and see what explanation seems fitting for you.