Is it okay to get Botox in my 30s if I have fine lines?

I am in my 30s, and lately, whenever I look in the mirror, I’ve started seeing fine lines on my forehead and between my eyebrows, so I’m considering getting Botox.

I don't usually pay much attention to it, but the wrinkles are definitely visible when I smile or frown, and they seem to stand out even more after applying makeup and some time passes. Since they aren't deep wrinkles yet, I'm wondering if it's right for me to start getting Botox now.

I'm feeling even more confused because some people around me say it's better to get it done before my wrinkles get deeper, while others advise waiting a little longer because starting too early could lead to developing a resistance later. Especially since it's my first time, I'm worried that my facial expression might become too stiff, my forehead might feel heavy, or my eyebrows might droop...

Is there anyone in their 30s who has tried Botox for the first time without severe wrinkles? I'm curious if you were actually satisfied with the results, and if it would be okay to get it done early given the level of fine wrinkles I have now.