Help me with skin care please!!

Hey, so my brother really want to start skin care

I myself never needed the skin care and i dont use anything

So please can anyone help me here who can tell me what and how to use skincare products

HE HAS OILY SKIN

LOT OF PORES ON FACE

HE USED TO HAVE LOT OF ACNE AND POPED THEM SO THERE ARE MULTIPLE MARKS