Lately, whenever I look in the mirror, I've started noticing slight wrinkles around my mouth. Would it be okay to manage this in advance with fillers?

Lately, I get startled every morning when I look in the vanity mirror because I feel a slight line forming around the corners of my mouth that wasn't there before when I smile. It isn't visible normally, but it only becomes a slight indentation when I smile or talk, so it bothers me even more. I find out because I get photographed quite often at work (events, workshops, and even club gatherings), and I zoomed in on the photos afterward.

I have been managing my jawline and double chin with lifting treatments since last year, but since this is around the corners of my mouth, I'm not sure how to approach it. I asked around, and some say it's better to lightly tighten it with fillers rather than Botox, while others say it can be covered to some extent with lifting procedures, so I'm confused.

Right now, it is at a very early stage where it is only slightly visible when I smile. Is it worth getting fillers in advance even at this stage? Or would it be better to wait and see once the lines become more distinct before starting? I would be really grateful if you could also let me know how much filler is used and how long the effects usually last!! I have a family gathering next month, so I would like to get a consultation before then.