Random shower thought - What Is Electric Charge?

As far as I understand it there is positive and negative charge. But really, what is charge? Like charges repel and opposite charges attract. That is what we can observe. But are they really positive and negative? Or are these words just arbitrary words? Is that just a framework we can use to explain and predict what we can observe? ... and if so, what is the fundamental truth behind charge? Where does charge happen? At the atomic level? Is our model of the atom even correct or is that also just theory to help us explain what we observe?

Democritus came up with the concept for the atom in 370 BC in a thought experiment... then 2000 years later there was J. Dalton who came up with a crude model for the atom in 1803. In 1897 J. J. Thompson came up with a crude concept for positive and negative charges in an atom "pudding" that was abandoned in 1911 when Rutherford came up with another model where the atom has a nucleus which contains protons and neutrons with electrons on the outside... this model was refined by Niels Bohr who added electron orbits to this model. Then came Shrödinger in 1926 who removed the orbits and replaced them with clouds where it would be likely that an electron would be located due to the concept of uncertainty... This is still the model for the atom that we use today. But is it the final truth?

This is the image of an actual hydrogen atom... it's the best thing we have so far. Looks like a ripple in a pond. A wave function. Resonance... frequency... ?

There is no real point to this post.