Generally speaking there 5 types: normal, dry, oily, combination, and sensitive skin. Combination skin is where one area of your skin is different for the other. For example, if you have a T-zone you are oily in that area, but normal everywhere else.
Skin types can change over time. This can be due to age, hormones, medication, and even diet.
If you’re not sure what your skin type is gently wash your face and leave it product free for at least a couple of hours. Just pay attention to your skin throughout that time and then examine it closely.
Once you have that down you can try some different products and keep track of how your skin reacts to each one. After that, you’ll set into your routine.