I keep worrying about the remaining marks.

My acne has subsided somewhat, but I am constantly self-conscious about the remaining marks every time I look in the mirror. At first, I thought they would naturally fade over time, but even after several months, the red and brown marks remain, which has really lowered my confidence. They don't completely cover up with makeup, and they stand out even more under lighting, so I find myself self-conscious of my face whenever I meet people. I feel envious when I see people with clear skin, and I worry that this happened because I didn't take proper care of it. When I search online, there are so many methods—from ointments to lasers and cosmetics—that I don't know what to choose. I feel burdened by the thought that I might get an expensive treatment and it might not work, but on the other hand, waiting without doing anything feels like a waste of time. Most of all, the hardest part is the stress of worrying that new marks will remain every time a new pimple appears. I have hope that my skin can improve, but I am not sure what order I should follow for care, so I would like to hear expert advice. I would appreciate it if you could tell me what treatments or care are suitable for my skin condition, what the likelihood is that the marks will disappear naturally, and if there are any essential daily habits I should follow. Rather than hastily trying this and that, I want to regain clear skin by consistently practicing methods that suit my skin, even if it is just little by little. I want to hear that my skin can definitely improve if I manage it correctly, even if it takes time, and I would also like to receive honest advice regarding the realistic changes I can expect and the duration of the treatment.