Software-as-a-Service (SaaS) subscription platform to build-your-own-Digital-Center-of-Excellence (CoE) for a centralized group of designated experts in an organization in charge of spreading best practices and solutions through the organization or to train and certify employees in digital skills; providing a Virtual Sandbox having pre-installed software for learning or training or demonstration or to build digital proofs of concepts (POCs) for prototypes to show feasibility of a concept for hands-on skills; providing access to a pre-created digital POC library with multiple examples; Software-as-a-Service (SaaS) subscription platform for chief officers of a company (CXOs, CEO, COOs, CIOs) to access a build-your-own-Digital-Center-of-Excellence (CoE) for a centralized group of designated experts in an organization in charge of spreading best practices an or solutions through the organization or to train and certify employees in digital skills