Skin Health Question: Will simply drinking plenty of water and getting enough sleep definitely make a difference?

To be honest, I've been quite negligent about skincare lately, but recently I've been hearing frequently that my complexion looks really bad. A friend says the foundation of healthy skin is drinking plenty of water and getting enough sleep; would that really brighten my tone a bit?

Alternatively, I am wondering if it would be a good idea for a man to start with some basic care or a light scaling that isn't too overwhelming. If you have any small habits you practice or methods that have worked for you, please share your advice. Please take good care of your health, everyone, and have a good night.