Getting started with Hasura GraphQL remote JOINs on multi-cloud distributed SQL involves setting up two YugabyteDB clusters, one on Google Kubernetes Engine (GKE) and another on Azure Kubernetes Service (AKS), each with a Hasura GraphQL Engine attached. The setup includes creating databases, tables, and data, as well as configuring a Remote Schema and Remote Relationship to join data from the two databases into a single result set. With this configuration, users can issue GraphQL queries that process data located in two different YugabyteDB databases, hosted on two different clouds, providing a scalable and highly-available GraphQL API.