Learning How to Design CSS Menus

I have discovered that I need how to learn a little bit about CSS so I can make changes to website templates to make them look the way I want to.  I have found a site that teaches how to design CSS menus.  They are very well made video tutorials that are easy to follow and understand.  I have been going through the lessons one by one and taking lots of notes.  I am going to watch them all one more time and decide which one I want to try first.  I am confident that I can customize a site after completing these lessons.