TYPO3 v8 has reached its end-of-life March 31st, 2020 and is not maintained by the community anymore. Looking for a stable version? Use the version switch on the top left.
You can order Extended Long Term Support (ELTS) here: TYPO3 ELTS.
Armed with this basic knowledge of TypoScript, you may want to continue your exploration of TYPO3 CMS by following the Templating Tutorial, which will guide you through the creation of a whole website template using TypoScript.
To learn more about the structure and syntax of TypoScript, you can refer to the TypoScript Syntax and In-depth Study reference.
Finally - as was mentioned again and again throughout this tutorial - the ultimate resource about TypoScript objects, functions and data types is the TypoScript Reference.