Does getting fillers significantly change my facial image?

As I lost weight in my face, details I didn't used to care about much started catching my eye one by one. The hollowness that couldn't be concealed even with makeup was a bit disappointing, and since it stood out even more in photos, I decided to look into fillers. However, after actually searching online, I found there was much more to research than I initially thought, as there are various types of fillers and slightly different durations and procedure methods. What particularly stuck with me was the advice that injecting a lot isn't necessarily better; it's important to consider the overall balance of the face and inject only what is necessary. I'm also curious if the results look natural immediately after the procedure, and I feel I need to be aware in advance that swelling or bruising can occur depending on the individual. Therefore, I think it would be better to get a consultation in person to determine which method is suitable for my face, rather than deciding based solely on online reviews. Please share your thoughts.