Acne marks last a long time. Is there a way to treat them?

My acne has almost completely cleared up, but I am worried because the red marks and hyperpigmentation have lingered for a long time.

I waited because I was told it would naturally fade over time, but the recovery is slower than expected, and the marks aren't covered even with makeup, which is stressful. I am particularly self-conscious because they seem to look darker in the sunlight. I am wondering if simple home care is sufficient in this situation, or if receiving laser treatment or other procedures at a dermatology clinic would be more effective. I would also like to know how long treatment typically takes if I decide to undergo it.