Oracle recently released the much anticipated SampleApp virtual box (version 511) which comes packed with OBIEE 12c and all of its great new features.
You can download it here.
SampleApp usage has always been a great way to get first hand experience of OBIEE. You can gain hands on experience before you're ready to unleash it to your clients.
A bit about me. I am an Oracle ACE Pro, Oracle Cloud Infrastructure 2023 Enterprise Analytics Professional, Oracle Cloud Fusion Analytics Warehouse 2023 Certified Implementation Professional, Oracle Cloud Platform Enterprise Analytics 2022 Certified Professional, Oracle Cloud Platform Enterprise Analytics 2019 Certified Associate and a certified OBIEE 11g implementation specialist.