Retin-A is an amazing anti-aging skincare to use. Make sure to use it only if not pregnant or breastfeeding.
Since it is prescription based, find a reliable doctor who can explain to you clearly how it works and how best to use it.
Also, make sure to use retin-A before any thick moisturisers, since it is not useful to use with a protective layer of moisturiser on the skin. I like to apply it in a gentle layer over the whole face and leave it for 10 minutes before applying my moisturiser.
Hope this helps!