Question) How can I get rid of acne scars and restore my skin barrier?

My skin type is naturally oily, especially in the T-zone. But about a month ago, I started getting pustular acne all over my forehead, chin, and cheeks. It didn't go away easily, and it left scars. Also, maybe because of the cold weather and indoor heaters, my skin became red, looked even dirtier, and even itchy, which made me even more concerned. It felt like my once-strong skin barrier was literally breaking down, leaving me sensitive.

To combat acne scars and strengthen my skin barrier, I've tried a variety of daily habits, including drinking plenty of water, cutting back on flour, eating a healthy diet, and getting enough sleep. I've also tried to incorporate acne patches, frequently using acne-fighting face masks, minimizing makeup, and avoiding touching my face. However, I'm deeply concerned because my skin isn't improving easily.

How can I get rid of acne scars and restore my skin barrier?