How many sessions are recommended for acne scar treatment?

When I was in school, I used to just blindly squeeze my acne with my hands, and now I have so many pitted scars on both cheeks.... I regret it so much ㅠ

My confidence has been sinking because I get self-conscious about my scars every time I take off my mask. So, I’ve decided to take the plunge and get proper acne scar treatment. Since my scars are quite deep and old, I have no idea how many sessions I’ll need for new skin to fill in. I know skin regeneration rates vary from person to person, but roughly how many recommended sessions should I budget for to see noticeable changes? I look forward to hearing real advice and tips from those who have started acne scar treatments due to severe pitted marks like mine.