Planning to keep injecting daily for at least three more months like others here have suggested, but wanted to share where I've landed in case it's useful to someone.
Dug into this further since then and basically arrived at the same conclusion, a solid skincare regimen wins out for fine lines specifically, backed by real clinical research rather than just word-of-mouth reports about the under-the-skin version.
Already started applying a retinol serum twice a week and plan to move up to the stronger prescription-strength version if I can get access. From what I've gathered that one's considered the gold standard, though the middle-tier option also delivers strong results without needing a prescription.