you can start here
http://www.antonine-education.co.uk/physics_as/module_3/Topic_3/kirchhoff.htm
Regard Kirchhoff as principles rather then formulas. Try to understand them rather then purely applying them.
Combine them with Ohm's law in linear circuits to calculate the results.
Also master the basic principles of voltage dividers ( two resistors in series for instance), resistors in parallel, etc... first.