Please recommend a treatment for blemish care.

Hello. I am writing this post because I am incredibly stressed about the skin blemishes that have worsened significantly lately. Recently, old acne marks have settled in, turning red or dark, and they show no signs of disappearing. On top of that, faint dark spots or freckles seem to be appearing around my cheeks, so I just sigh every time I look in the mirror. I have been consistently applying Vitamin C serums that are supposedly famous online, and I even slather on a generous amount of whitening cream before bed, but honestly, I don't see any noticeable effects. I am upset because my skin seems to be getting more sensitive instead. There is a limit to how much I can cover them up with makeup now, and if I apply concealer thickly, my makeup cakes and looks even messier. Eventually, I started looking into laser treatments at a dermatology clinic. I am worried about whether procedures like toning or IPL are effective, or if there might be side effects that cause my skin to break out even more. Since the cost is quite steep, I am hesitant to just go ahead and pay for it. Do you happen to have a skincare routine or product recommendations that you found truly effective after struggling with blemishes or marks like me? I look forward to hearing your valuable opinions. Wishing everyone beautiful skin!