When to start anti-aging regimen (eg GHK-CU)?

Im a 32 year old male and noticing visual signs of aging (wrinkles, greys, & skin discoloration).

I wear sunscreen, moisturize my face, apply tretinoin once a week, as well as vitamin c. But Im still aging a bit worse than peers.

Is there an anti-aging protocol (supplements, peptides, etc) that is relatively safe to begin with the goal to slow down the physical aging process?

Can someone take GHK-CU indefinitely for more youthful skin?