The first step would be to know you skin type. Then once you've established that you get a cleanser, treatment serum or toner and a moisturizer.
Wash your face and wait a few minutes and examine your face. If it feels tight and looks dry and ashy its on the dry side. If there is no change your most likely oily And if your normal/dry and oily in the T zone you could be combination. Also take into consideration the time of the year. Colder months make skin feel extra dry. And those who have acne do not necessarily have oily skin it can be dry.
You can find the product descriptions under each product. If you have any further questions regarding the ingredients and your skin type your can send an email in the Contact Us page. Or send an email to firstname.lastname@example.org.