Words are always a problem, and never more so when discussing spirituality/meditation/cultivation.
There are many, many different types of meditation, designed to do very different things. There are forms of breath meditation whose primary purpose is to calm the body. When you do so, you may notice certain things about reality/yourself, but knowing “how to meditate” doesn’t mean you have achieved any level of insight or awakening; it’s just a technical skill.
But almost all of what I would consider real spirituality is about “knowing thyself.” This is primarily about observation; about noticing facts about yourself that you hadn’t before, and then noticing them over and over until something clicks and you start perceiving your existence in different ways than the norm.
When teaching “meditation” one of the main questions is how much to signpost; how much to point. If you tell people what they’re looking for, they’re more likely to see it, but the power of the insight is weaker than when it takes them by surprise.
That said, I’m going to “point” to something: almost nothing exists.
If you either calm the chatter of your mind or learn to disregard it (it doesn’t matter much which) and rest your awareness lightly over the sensations you’re feeling, what you may notice is that there isn’t a lot there. Mostly there’s a lot of nothing, with some sensations floating in space (which is also a construct, but that’s a later thing).
It’s an odd thing to notice, that you aren’t solid. You think of yourself as solid: a body, but the actual experience isn’t that and that you believe it is is because you’re filling in what you “know” is there, stitching together a reality which doesn’t actually exist.
Try it sometime. Just be still, calm the mind or ignore the chatter, close your eyes, and see what’s actually there. (You can do this with eyes open, but it’s easier with eyes closed.)
You may be surprised.