I'm wondering if I'm starting wrinkle Botox too early for preventive care.

My wrinkles aren't very deep these days, but the lines that form when I make facial expressions seem to last longer than before.
It used to feel like it would go back to normal right after I laughed, but recently, it seems to linger faintly even when I'm just sitting still, so I find myself looking at it for no reason haha.
So I looked into wrinkle Botox, and I heard that you don't have to get it only after your wrinkles have already deepened.
Are there many people who receive Botox relatively early on, considering it as preventive care for wrinkles?
Since it isn't severe yet, I'm not sure if it's right for me to wait a little longer before getting treatment, or if it would be better to manage it before it takes deep root.
I feel burdened because I started too early and now I feel like I'll have to keep getting wrinkle Botox in the future.
On the other hand, I also wonder if it might be more difficult to manage if I postpone it for a few more years and the line is firmly established.
If I start wrinkle Botox for preventative purposes, can I manage it by getting moderate doses only when necessary, rather than receiving a strong dose from the beginning?
Rather than getting the procedure done on a fixed date no matter what, I’d like to do it once in a while whenever I look in the mirror and start worrying about it again haha.
I am also wondering if it is okay to take a break for a while after the effects have mostly worn off from the first treatment and then receive it again.
And for those of you who started wrinkle Botox early, did you actually feel that it helped prevent wrinkles from deepening over time?
I am especially curious about reviews from those who started when their condition wasn't too severe, like mine.
I am not looking for an answer that I must receive it right now, but I would like to know if a consultation would also assess whether it is truly necessary given my current situation.
For those of you who started getting Botox for wrinkle prevention, please let me know what made you decide in the first place and how satisfied you actually were.