How long can I expect the filler to last?

I am writing to inquire because I am curious about the duration of filler effects.............

I am considering getting fillers on my nasolabial folds and chin, but I don't really have a sense of how long they last after just one injection.

I know it varies from person to person, but I’d like to know the approximate duration and think about the budget or schedule.

I think it would be burdensome to have to get it done too often, but I'm also scared to put in a lot from the start just because it lasts a long time.

I am also wondering if it is possible for first-time users to naturally start with a small amount and add more later if needed.

I also want to know if the duration of the filler varies depending on the area.

For example, I’ve heard that the lips fade quickly while the chin lasts a little longer; I’m wondering if that is true.

I would also like to know if the shape can be adjusted if I am not satisfied with it after the procedure, and could I be informed about the differences between the product types during the consultation?