I am trying to understand how light works and electromagnetic radiation, from what I understand charges cause disturbances in electric fields, which triggers a magnetic field, and then the back and forth continues as the oscillation in both fields travel from point A to B.

What I am unable to understand is how is this connected to light, how does the frequency or wavelength of these waves allow us to see.

I also don't understand how any of this is connected to photons, and energy travelling as the electromagnetic wave.