HyperText Markup Language is the core syntax for putting information on the worldwide web. If you want to create or modify web pages, it's best if you learn HTML.
Cascading Style Sheets is a language for describing the appearance of web pages. To create good-looking web pages, you need to learn CSS in order to define the appearance and location of the HTML elements within the pages.
Are you tired of learning on your own?
Do you want to join a community of people learning about open web technologies?
Consider signing up for free online peer study groups through Peer-to-Peer University's School of Webcraft. Share your discoveries, struggles, and victories with others who are learning the same things.