Current is flow of electrons towards positive charge inside some conductor (any good conductor like copper wire), more about this you can read in below blog
Voltage is the electrical potential difference between two points e.g. Difference between two nodes of a battery (+ and -), + end has lack of electron, while – end has surplus of electrons and because electron are attracted towards protons ,they move towards + sides and causes the flow of current . But this will happen, only if we will close this circuit, means connect these two nodes of battery through some wire. If we will place anything in between these two wires like bulb, electron will pass through the bulb and it will lighten up.
Now the wire which we use to connect two ends of a battery are usually conductors like iron, copper etc. Because conductors have a free electron in its outer shell, so it allows the movement of electrons freely through them.
Assume you are sitting in some open field without holding to anything, suddenly a running crowd appears and pushes you forwards, what will happen?