What is the best order for managing acne scars?

Hello, I am an office worker deeply concerned about acne scars. For the past few months, I have experienced recurring breakouts on my chin and cheeks, and now I have both red marks and slightly pitted scars. I would like to organize the proper order of home care before visiting a dermatologist, but I am unsure. I wash my face twice a day using a mild foam cleanser and apply a lightweight moisturizer. I also tend to apply sunscreen daily. However, the redness does not subside easily, so I am wondering if ingredients like Vitamin C or Niacinamide would be helpful. I would also like to know if there is a way to distinguish at home whether the scars are hyperpigmentation or atrophic scars where the skin is actually pitted. For those with experience, I would appreciate your advice on the order in which you managed your skin and which treatment you should consult about first at a clinic.