I believe my understanding of electric currents is flawed and want some help to clear up a few things. I'm not looking for a precise scientific understanding, but to understand the basics. I'll try to explain my understanding instead of asking a bunch of questions but if I should boil this down to one question only, that would be how the energy is transferred from the battery through the electrons and into heat making the lightbulb glow? I know the explanation below is very simplified, but is it simply wrong? (English is not my first language)
Let's think of a simple circuit consisting of a battery, conductors and a light bulb. I know batteries are very varied, but to simplify a lot we can think of the minus-pole of the battery consisting of electrons being "released" into the conductors, this causing the voltage drop to occur. This causes the electrons in the whole network to bounce into each other, repel each other and being "driven" towards the plus-pole, I guess both because of negative electrons repelling each other and later them being attracted to the positive particles in the plus-pole. The energy, which makes the lightbulb glow, is the kinetic energy of the electrons, started by the battery introducing the voltage. This energy will be transferred to heat (at least in older lightbulbs (because of resistance in the thin wire in the bulb?)) causing the lightbulb to glow.