It's a weird question because, for me, it starts too far up the chain. Consciousness is a question of subjective perception, but I cannot yet truly define the a

It's a weird question because, for me, it starts too far up the chain. Consciousness is a question of subjective perception, but I cannot yet truly define the actual things that I perceive. So, as I look at my screen, I can acknowledge its existence and repeat stuff I've learned about about atoms, elements, etc. But, when I truly start to question how this physical world is held together and what proof we have that it even exists beyond, say, a simulation, then I fail. There is some fundamental level at which I'm not "certain" of anything. So, how can I begin to ask questions about how I perceive those things?