My own conclusion, and I hope nobody steals this idea (not that it is... probably... very significant), is that Knowledge is as if it is knowledge, and is only as if it is knowledge. — Blue Lux
Have you heard of Hans Vaihinger? He's one of those philosophers who was popular for a time but now forgotten, he wrote a book actually called
The Philosophy of As If. You might be interested in it (although it's not quite as good as one thinks it might be from the title).
To reiterate: awareness is presence-with, actually just being (just being is always causally-concatenated with other being). One way of looking at it is that perceptions are perturbations of one's being - poetically speaking, one's very body and brain shimmer and thrill with the impact of rills of sound and light. What we experience when we see something is first of all that very perturbation of our being, and then partly consciously, partly unconsciously, the brain, our mind, however you want to think of it, tries to model
what reality must be like for that perturbation to have occurred then and there, in that way, and then that sets our
expectations for further experience. When symbolized in objective, public form, and ordered and structured into logical patterns, in language, in texts, on computers, those expectations become what we call "knowledge."
A lot of our knowledge was "worked out" by our animal/animalcule ancestors - we inherit their rough and ready sense of what the world is (which gave them at least a "pass" in their own lives, even if it may not have been wholly accurate), and then we refine it (cf. Schopenhauer for a marvelously concise distinction between "understanding," which we share with most of the higher animals at least, and "reason," the first being an instinctive, shared understanding, long worked-out, of the world as 3-dimensional, comprised of solids in motion, etc., etc., the second being more concerned with overt symbolization of the same). Some of this is partly what Plato was getting at with the idea of "Recollection." And in that sense you are right that we "already know" quite a bit about the world.
Now the perturbation of our being (what we call awareness or consciousness), in and of itself, is not yet knowledge. Knowledge is the projections (about reality) and expectations that perturbation elicits - whether from the instinctive level (again, what we share with animals) or from the level of our trained, learned and symbolized expectations about the world around us.
And knowledge always goes beyond, outside, refers outside of, the present perturbation (perception, awareness), to a larger world that's "outside" it (actually just not-it, but causally connected to it).