The installation guide contains installation instructions: Quick Installation.
You will need a web server like Apache with PHP and a database. See System Requirements in the "Installation and Upgrade Guide".
If you do not have a system available, that meets these requirements, there are several alternatives:
- You can use the XAMPP package (http://www.apachefriends.org/xampp.html). It will install Apache, PHP, MySQL and other useful tools on all established operating systems (Linux, Windows, Mac OS X).
- You can setup TYPO3 with DDEV, which provides several pre-configured environments
based on Docker, including TYPO3. Setting up TYPO3 with DDEV in the contribution
guide contains some information about how to setup TYPO3 with DDEV, but
git clonein the first step, you should download a release from https://get.typo3.org.