Brightness measurement

Hello,
I have a small problem.
We should determine with the help of a Photovoltaikzelle, current sensor (KEFA 301) and of course to the Arduino the short circuit current as a function of the Abdunklung. Because I am a complete Noob am what Arduino programming it concerns and I only orders like z. b SerialPrintln knows me have no plan like me this should begin.
I hope you can help me, even if today Sunday is:stuck_out_tongue:
Dear greetings
byDarcor