It's too flat and plain, so it feels cheap, and I want to get fillers.

On my way home from work, I happened to look at my forehead under the elevator lights. The bone was protruding while the center was deeply sunken, making it look like a bumpy stone pavement. I usually cover it with my bangs so I didn't notice, but whenever it was windy or I wore my hair up, my profile looked so flat and bland that I felt like I looked cheap. Since I heard that bone surgery or fat grafting involves hit-or-miss survival rates and requires a week of rest due to swelling, I decided to go with forehead fillers, which allow for immediate return to daily life. I heard the key is finding a clinic that can create a smooth line like a peeled egg without any bumps; is that true? Since a large volume is injected into this area, I'm worried about eye heaviness or pressure like headaches caused by the weight of the filler. For those who have had large amounts of forehead filler injected, please share your vivid experiences with the swelling process.