I am very new in Typo3 world and I am reading the official documentation of this CMS.
I came from Joomla and WordPress and I have some doubts about how Typo3 extends the provided functionality.
For example if, in Joomla, I would have an immage gallery or a forum into my CMS I have to install a forum component that provide me this functionality and some modules that show me some output into the pages. Similar logic is implemented by WordPress
How work Typo3? How can I add functionality to Typo3?
Login as an administrator and go to Extension Manager, next update the list of extensions from repository, and finally click the icon to download ext and install it. That's all