Can the people who have done the outline 3 come in just once..? Please..

I'm 21 and it's been 6 months since I had 3 types of contouring surgery. I asked the hospital and they said that my jawline is a bit chubby because I'm still young and my cheeks are chubby, but I'm so anxious about sagging. Of course, I know that sagging will occur 100% if I get contouring, especially if I have wide cheeks, but isn't there a way to maintain my face so that it doesn't sag as much? ㅜㅜ Unlike my peers, I don't want to get bulldog skin in my late 20s and age quickly and sag... I think it'll be even worse when I'm in my 30s... I know a woman in her 40s who got 3 types of contouring and completely changed her face, but her face still looks like she's in her mid-20s. How on earth did she manage it? If I start taking care of it consistently now, will I be able to have almost no sagging? They say collagen is important for skin elasticity, but if I start eating collagen and dieting without gaining weight and using sunscreen, will it be effective? I said I wouldn't get petite procedures because I was afraid my face would look tattered if I got them too often... But if they're effective, I'm definitely going to get them! I know I have a severe obsession with my looks, but if my face gets ruined, I feel like I'll really fall apart.. Please, if there's a way to consistently manage it so that it doesn't sag,
 
please teach me. Please objectively evaluate whether I'm getting sagging or not..!!
 Thank you, pretty sisters, for reading the long post~