This Beginners Guide to Discord is a great place to start!
Click on the tabs on the top of the page to navigate to different sections.
Click on the "search" icon on the top-right to search the website
Hover over sections along the top to navigate to sub-categories.
Words or lines of text that are bold, underlined, or both link to another page or website. Click on them to be taken the new location. Sometimes, pictures will also link to another page - if you hover over them and your "click" pointer shows up, you know it links.
Icons that look like this (rectangular, rounded corners, text inside, either filled in white or green) are buttons. Click on them to be taken to another page.