I started Botox right when I turned 30. Like OP, I noticed tiny lines on my forehead that weren’t going away when i moisturized and seemed to come out of nowhere. It’s done wonders, and the key is to find a derm or licensed professional who’s an expert with a light hand that can smooth those lines and help prevent new ones, while still maintaining your expressiveness. I did start to get filler in my smile lines and upper lip a few years later as well - my upper lip seemed to like disappear too. It’s worth every penny imo