I want to get forehead fillers. Will the shape turn out naturally?

Every time I look at my profile, the middle of my forehead looks slightly sunken and the area above my brow bone looks prominent, so it really bothers me.

I have a limit to constantly covering my forehead with my bangs, and I am considering forehead fillers to create a round, three-dimensional look. However, I’ve heard from people around me that if done incorrectly, it can result in a "Crayon Shin-chan" forehead or become bumpy, so I’m scared and can’t decide on a clinic. Has anyone actually gotten forehead fillers?

I am wondering how many cc I should usually add to smoothly fill only the sunken areas naturally without looking artificial. I also want to know if adding too much will prevent the molding from working well or leave an awkward, soft feeling when pressed.

Also, I am curious if there is a noticeable difference between domestic and imported hyaluronic acid fillers in terms of duration or how well they hold their shape.