How should I schedule my Botox injections?

Hello. I am a middle-aged woman stressed about the deep wrinkles that appear around my eyes and between my eyebrows whenever I smile. I laugh a lot, but now that I am self-conscious about the wrinkles, I am even afraid to laugh to my heart's content.

I've been told I have a pleasant impression, but when I look in the mirror, all I see are wrinkles, so I'm thinking of getting Botox. However, I'm worried that my facial expressions might look too awkward or artificial after the injection. I just want my complexion to brighten up naturally. How much Botox would be the appropriate amount?

I am also curious about how long the effects last after a single injection, and how I should schedule follow-up Botox treatments to ensure the effects don't wear off. I would be very grateful if you could share any tips on how to choose a safe and reputable clinic without side effects. How is everyone else managing their aftercare?