How to use proactive?

ok so i recently got proactive and its the first time i use and i wanted to know how to use it i know it has guide in the product but i wanted to make sure i am doing it right from those who actually use it i got the 3 step system along with the refining mask & green tea mositeriziuer i would really aprriciacte if someone help me with this also can you use proactive after i take a shower i know that the 3 step come first im more concern on when should i use the mask & moisteriziuer anyways i really appriciate thanks!