How do you manage acne scars?

I've been having a lot of concerns about my skin lately. Perhaps it's due to academic stress, but I keep getting acne, and even after it subsides, the scars remain, which is frustrating. I'm not sure how to start managing my acne scars. I'm wondering if home care is enough, or if I should also seek medical treatment.

When choosing an acne scar management product, what should I look for in terms of ingredients and application order? I have sensitive skin, so I'm concerned about irritation, and the cost and timeline are also realistic concerns. I'd also like to know how I should change my lifestyle, cleansing, and sun protection to maximize the effectiveness of my acne scar management.

Also, for those of you who have experience with acne scar management, could you share how long it took to recover and what tips you have for not giving up in the middle?