I'm planning to get fillers. What is the injection cycle?

Since losing weight in my face, the area around my nasolabial folds has become a bit more prominent, and my cheeks look sunken compared to before, so I am looking into filler treatments. Even after regaining my weight, my face doesn't regain its previous volume, so I am considering starting with a simple consultation. I am looking into full-face treatments for the nasolabial folds, front cheeks, side cheeks, and forehead, but since there are so many areas, I am wondering if I should make a decision all at once. If anyone has received filler treatments and consulted about multiple areas simultaneously, I would like to know how the consultation proceeded. I do not want a drastic change in my facial contours; I just want to naturally correct the areas that look sunken. In particular, since the shape of my nasolabial folds differs when I smile compared to when I am still, I am curious about how much filling would look natural. The front and side cheeks are located in different places, so I would like to understand the differences between them before the consultation. Regarding my forehead as well, I would prefer to focus only on the necessary areas rather than filling it out completely. Is it okay to explain my specific preferences in detail like this? I would appreciate any advice from those who have had similar experiences.