Hello, I used to have pretty bad acne so I can probably help you with this.
You can buy a cleanser for pimples from your local drug store that says it's good for all skin types. Don't buy one that says it's best for oily skin or dry skin because you have combination skin and it could actually worsen your condition.
If you have some larger pimples then you could put a small drop of toothpaste over those ones before you go to bed to make them go away faster.
If you notice that your skin gets oily and shiny on some parts, you can buy witch hazel, put some on a cotton ball, and then gently dab it on the areas of your skin that get oily.
Hope this helps a bit!