Take a look at this link.
Here, the complete tutorial about Java EE 8 https://javaee.github.io/tutorial/toc.html
For Java EE, you need an application server Java EE compatible, for example: Glassfish, Weblogic, Wildfly, Payara, etc. Also you must download an IDE with support for Java EE.
Java EE was renamed to Jakarta EE (https://mmilinkov.wordpress.com/2018/02/26/and-the-name-is/ https://www.eclipse.org/org/workinggroups/jakarta_ee_charter.php)
and future release will be using the new name.