Question

we know that clouds have charge. can we produce current through these charges?

Answer 1

It is true that clouds have charge. So does every other body with mass. All matter is made up of atoms, which contain positive and negative charges. You may know that these charges are in the form of electrons and protons. Although protons of an atom generally do not interact with other atoms, the electrons are loosely bound and require little energy to get into excited state. This little energy can come from heat from the temperature of the environment, any forces acting on the body, etc. These excited electrons wobble and often dislocate to other locations. But, this is not enough to create electrical current. (Note: there is a difference between electrical charge and electrical current).

The clouds are also made up of matter and contain electrical charge. But air is not a good conductor of electric current. Therefore, current is not produced. The exception of this being in case of lightning which comprises of plasma, which is far beyond the concepts of this question.

Answer 2

Lightning is produced by electrical charges in the sky.
Lightning is an electrical discharge in the atmosphere between oppositely charged clouds or between charged cloud  and the earthy.
Cloud to ground lightning discharges 30,000A of current and upto 100 million volts and emits light consisting of Gama rays, X rays , radio waves.
Plasma temperature in lightning can approach 28000K .  To handle so much of power, heavy conducting rods should be used and with ultra heavy electrical circuits and storage capacitor.Although we do not have that technology in electrical energy storage yet.
So it is not easy to use this charge as electricity.