Does drinking a lot of water really improve your skin?

My skin has been so dry lately, so I'm challenging myself to drink 2 liters of water a day, but I just end up going to the bathroom frequently and I don't really see any results yet lol. Do I need to do it for over a week for the effects to show?

Or maybe it's just my imagination... Besides drinking water, please recommend some daily habits that are sure to work wonders for the skin!