Is it possible to consult about forehead volume loss due to fillers?

I would like to inquire about forehead fillers.

My forehead isn't exactly flat, but I'm bothered by the fact that the middle part looks slightly sunken in photos and the line isn't smooth from the side. I didn't notice it when I used to cover it with my bangs, but lately, whenever I sweep my hair back, my forehead line keeps showing through haha.

I'm looking into forehead fillers because I heard they can soften the look of the face. Would it be worth getting a consultation even for a first-timer?

I am worried because I heard that if too much is put into the forehead, it might look unnatural or heavy.

I want just enough to naturally smooth out the sunken areas, rather than excessive, round volume.

I am also curious if the filler volume varies depending on the shape of the forehead or the degree of hollowness. Additionally, I would like to know the extent of bruising, swelling, and a foreign body sensation when touched after the forehead procedure.