capacitors alevel physics aqa

For capacitors in physics alevel, I thought current and voltage of the capacitor increases somewhat proportionally because when charging the voltage has to increase to meet supply voltage for it to be fully charged and then i thought current would be increasing too, but then i suppose it decreases as the electrons are stored in the capacitor and the current is the flow of electrons, it would decrease the, but why does current on the current time graph start at the top when voltage starts from 0 on the voltage time graph im just confused, could someone explain the current time graph and the voltage time graph, why they are different and what are the differences in the two when learning about capacitors? Please and thank you.