This tutorial will introduce you to use Cascading Style Sheets (CSS, which can help you to produce great looking web pages.
The World Wide Web Consortium (W3C) - the non profit, standard setting consortium responsible for standardizing HTML - created STYLES, in addition to HTML 4.0, as it became more and more difficult to create Web sites where the content of HTML documents was clearly separated from the document's presentation layout. You can use w3schools.com to learn more about CSS than what is covered in this tutorial. .
The tutorial will only cover the basics and then it is up to your to continue down the CSS path. Like any new subject, it does take time and effort on your part. CSS is not something that you will learn in an hour, a day, a week, or a month. It is a continual process.
Do not underestimate your ability to absorb this material! If you have made a web page, even one using a What You See Is What You Get (WYSIWYG) editor, you can learn how to use both CSS and HTML. Yes, HTML! You will need to make your pages with HTML as then you can truely unlock the power of CSS.
Use the menu at the top left to go any one of the 12 lessons of this tutorial or use the Next CSS Lesson and Previous CSS Lesson at the bottom of each page. Take your time and let the material sink in.