Where should I get fillers for the highest satisfaction?

When I first looked into fillers, I simply thought it was a procedure to fill in sunken areas. However, after researching various aspects, I realized there are more factors to consider than I initially thought, so I haven't decided right away and am looking into it a bit more. I heard that the amount needed varies from person to person, even for the same area, and the degree of suitability can differ depending on face shape and skin condition. In particular, I learned that injecting too much can result in a look that differs from what I intended to achieve, so it seems important not to be too greedy. These days, I prefer a look where I can just slightly refine the areas that are lacking in my natural face, rather than drastically changing it, so I find myself researching more thoroughly. When I go for a consultation, I plan to mention what aspects of my face I am most concerned about in my daily life, rather than just talking about the specific areas I want treated. I think it is important to consider the overall harmony rather than just the filler itself. I am struggling to decide which areas to focus on; I would appreciate your advice.