In order to participate in the Hands-On Labs run at conferences, and so forth, it is preferable to install the pre-built VM.
The Database App Development VM includes Oracle Database 18.3, Oracle APEX 18.2, SQL Developer 18.3, and Oracle REST Data Services (ORDS) 18.3. Most importantly all of the labs pre-installed and pre-configured.
Follow these steps to install the VM on your laptop:
If you can not install the VM, then you will need another environment, such as Oracle Database Express Edition (XE) and Application Express 18.x or later installed onto your laptop.
If there is strong enough internet connectivity, you could also use Oracle's free hosted-service apex.oracle.com, or Oracle Database Cloud Service.
Below are files that you can download and work from in your own environment, on https://apex.oracle.com, or in the Oracle Database Cloud: