I'd like to inquire about Botox and fillers in Gangnam! It's my first time, so I'm worried about where to get them done.

Lately, whenever I look in the mirror, I feel like my facial expression has changed a little compared to before, so I am looking into Botox and fillers.
Maybe it's because I've never had the procedure done before, but the more I search, the more conflicted I get.
In particular, the jaw area feels wider than expected when taking photos.
It looks fine from the front, but it bothers me when I look at photos taken from the side or slightly below.
So, for now, I want a natural-looking finish rather than a change that is too obvious.
I asked my friends around me, and they said that you shouldn't take Botox as simply as you might think.
I heard that you need to get a proper consultation based on your face shape and muscle mass.
It’s not necessarily important to inject a lot of filler.
I heard that I need to make a decision based on the overall balance of my face, so I am looking into it more carefully.
I am currently looking for a hospital in the Gangnam area, but since there are so many hospitals,
I don't know what criteria to use to choose.
I'm a little worried about choosing it based solely on the price since it's a procedure on the face.
But it's also a burden to only look for places that are too expensive.
I'm curious what criteria you used to choose a clinic for Botox.
Things you must ask during the consultation or when receiving it for the first time
I would appreciate it if you could also let me know about any precautions!
Especially when you want natural results
My biggest question is whether they provide thorough consultation.
It's my first time, so I'm nervous for no reason.