How long do the effects of Botox actually last?

I've been researching various things about the effects of botox lately.
Everyone says things so differently that I'm confused.
Some people say it all goes away in 3 months, while others say it takes over half a year.
I heard that the effects of botox vary depending on the area. Is that true?
I'm thinking about the area between my eyebrows and my chin. It's my first time, so I'm a little worried.

I also wonder if the effect comes naturally.
I'm not sure if it's noticeable right away or if it takes a few days for it to settle in.
I've also seen reviews saying that facial expressions become awkward or the jaw becomes stiff. Is that actually common?

There are ways to make the effects of botox last longer, but does it really make a difference?
I've heard that you should avoid exercise or massage after the procedure, but I'm not sure if that makes that much of a difference.
I just want to naturally reduce my wrinkles.

Some hospitals also say that the effect is short-lived the first time you get it, but lasts longer after a few times.
I wonder if that's true.

Are there any areas where you were satisfied with the effects of Botox or areas where you regretted it?
As a beginner, I'd like to hear some honest reviews or advice.
Please also let me know the procedure time, pain, and whether I can return to my daily life right away.