Skincare routine

I've never had a skincare routine, but recently have been hearing a lot about products like retanol.

Curious to know about the most effective products you have used (or is all of it just a scam)?

What do you all consider essential skincare products for daily use. Give recommendations also please, minimally invasive too

Do mention products you use. How are the “minimalist” products?

How do desk job workers (especially men) take care of their skin? I recently discovered that the bright indoor lightings can also cause skin damage. Please share your routine and product recommendations.