People tell me I have no flesh on my face and look like a skeleton. Will filler treatment be effective?

My face is usually very thin, so I always look lifeless and often hear that I look like a skeleton. The area below my cheekbones and around my cheeks is deeply sunken, which makes my impression look a bit sharp, and that has always been a source of stress for me. So, I would like to take this opportunity to get filler treatment. I want to smooth out my features.

However, I often see people around me regretting getting fillers because their faces ended up looking unnaturally puffy or it was too obvious they had surgery, so I am honestly very worried. I don't want to be overly ambitious; I just want to preserve the strengths of my original face shape while naturally correcting only the flaws. Also, are there any side effects where the filler flows to other areas or shifts over time, causing the shape of the face to change?