“What is the difference between conventional current and real current?”
Conventionally. the direction of current is defined as the direction of flow of positive charges. But in real case, the flowing charges are not positive (in the case of a metal); but the current carriers are electrons which are negatively charged. So, the real current is (the word current means flow) in a direction opposite to the conventional current.
So, if you are asked to find the direction of current in a circuit, you have to find the direction which is opposite to the direction of flow of electrons.