Getting started with Sass is really easy if you understand CSS, there are a small amount of changes you need to make in order understand the basics of Sass.
Using nesting makes writing CSS/Sass so much easier, once you get use to it, you will begin to write it naturally, the basic principle of Sass nesting is to cut down on how much you write and maintain clean, easy to read stylesheets.
A generic CSS will contain multiple class declarations which can take up a number of lines in your file; your basic CSS file may look something like this:
.wrapper { border: 0;