I'm curious about the Botox treatment cycle and when the effects start to appear!

Lately, every time I look in the mirror, it feels like the wrinkles between my eyebrows and around my eyes are getting deeper, so I am considering getting Botox for the first time in my life. Everyone around me says they get regular maintenance, but since it is my first time, I am worried about potential side effects or if my facial expressions will look unnatural. I am curious how many days usually pass after getting Botox for the wrinkle-smoothing effects to become noticeable. I have heard that the effect peaks about a week after the procedure as the muscles weaken, rather than immediately afterward; is that really true?

I’ve heard that once you start getting it, you have to keep getting it. So, how often should I schedule Botox treatments to minimize stress on the skin? I’d like to hear the know-how from those with experience on whether it’s better to get the next injection before the effects completely wear off, or once my muscles have returned to some extent. I’d also like to know which one lasts longer—domestic or imported—without worrying about resistance. I want to stop stressing about wrinkles and take this opportunity to manage them neatly with Botox. Please share any aftercare tips you have!