[Acne] Most of my pimples are gone, but how can I get rid of whiteheads and scars/PIH?

Beauty Tips For Body Care
Pics: https://imgur.com/a/4GrfcHey everyone! 16 year old female here. I used to have moderate acne, but after I started a new routine (and over time) it's gotten better. However I still have whiteheads on my forehead and chin, a few pimples, a few blackheads on my nose, and some scars/PIH. Here's my routine:AM: Wash with Cetaphil gentle skin cleanser Apply Paula's Choice 2% BHA liquid salicylic acid Let it dry then apply cerave moisturizing lotion across my whole face and cerave lotion in the tub to any particularly dry spotsPM is the same except I use "Bye Bye Blemish" 10% suffer drying treatment on a few pimples. I don't use sunscreen because I don't go outside that much in the winter (seriously like 20 minutes a day and it's always cloudy). I am planning on starting to use it once it gets sunnier. With my routine my skin is oily on my nose and forehead, but can be dry around my mouth.Any suggestions for my routine or in general? Thanks!
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Submitted by Kistcay