I'm curious about the price of fillers.

Hello~!^^
Lately, when I look at my face, my cheeks look sunken compared to before, and my nasolabial folds seem to be getting deeper little by little, so I'm worried. It's not like I've lost weight, but because my face looks lacking volume, I feel like I'm even giving off a tired impression overall. There's a limit to how much I can cover it up with makeup, so I'm thinking about getting a consultation for fillers. However, I've heard that prices vary significantly depending on the area and the product used, so I'm not sure how much budget I should set. I'd like to know how much it cost for those of you who have had fillers. Also, since it's my first time, I'd like to know which areas to start with for a natural look, and I would be really grateful if you could tell me about the advantages of combining it with Botox!