What are the precautions for Botox?

Lately, I've been bothered by my wrinkles every time I look in the mirror, so I'm considering getting Botox. I've heard that it's a relatively simple procedure, but since it's my first time, I have many concerns. In particular, I'm wondering if my facial expressions will look unnatural or if it will be noticeable to others. The most important thing for me is a natural improvement; can I expect such results from the Botox treatment?

I am also curious about the precautions I must be aware of before getting Botox. If there are any behaviors, foods, or lifestyle habits I should avoid before and after the procedure, I would like to know them in advance and prepare accordingly. I am also concerned that failing to follow the precautions might reduce the effectiveness or cause side effects.

I would also like to know if a single Botox treatment is sufficient or if I need to get it periodically. Since this is my first time, I am not sure what criteria to use to make a decision. I would like to receive a detailed consultation covering everything from the procedure to precautions and aftercare so that I can make a careful decision.