So you know basic HTML and some CSS...

host +

html file +

correct path to root

= website

host + cms + html + css + images + custom fonts + javascript

= better website

Types of tools

• Javascript libraries
• CSS frameworks
• Content management systems
• Server stack software
• Extensions to CMS

For example, SAUmag.edu runs ...

• WordPress on a LAMP stack
• Custom theme
• Bootstrap
• jQuery
• Wow.js, Animate.css
• MaxCDN
• Google Analytics
• About 70 third-party plugins
• About 20 home-brewed plugins

Javascript 

• jQuery
• Angular JS
• Node JS
• React

(CSS) Frameworks

• Bootstrap
• Foundation
• HTML5 Boilerplate

Content Management Systems

• WordPress
• Drupal
• Joomla

Site Builders

• Squarespace
• Weebly
• Wix
• Webflow
• Light CMS

Niche platforms

• Moodle - Education
• bbPress - Forums
• SugarCRM
• osTicket - Project Management
• Elgg - Social
• Magento - Online store
• MediaWiki

Let's buy a domain, server space, install a CMS, and set up a simple site....

Right now. It's really easy.