Finally let me help you solve problems based on what happens to the dynamic equillibrium when the concentrations of the products of reactants change.
For changes in concentration, the procedure is simple
First: Identify Whether or not the concentration is increasing or decreasing.
Second: The reaction will proceed in the direction opposite to the side at which the increase in concentration is on.
Third: The reaction will proceed in the same direction to the side at which the decrease in concentration is on.
Fourth: Remember that if the reaction proceeds in one direction or the other, all of the compounds on the side of the direction which the reaction will proceed goes up not just the one that changes.
