Are there any precautions before getting wrinkle botox?

Hello. As I've entered middle age, the wrinkles between my eyebrows and around my eyes have gotten deeper, so I feel like I'll be really upset if I don't take care of them...ㅠㅠ

The most recommended procedure around me is wrinkle botox. However, I am worried that after wrinkle botox, my facial expressions might become unnatural or my forehead might feel heavy.

Especially since this is my first time getting the procedure, I'm at a loss as to how to determine the dosage and injection location. If you have experience or are a specialist, it would be incredibly helpful if you could share some precautions before getting Botox for wrinkles or some tips for achieving natural-looking results. I'd also appreciate some realistic advice on the effects and duration. I think I need to start taking better care of myself now.