In addition to this user guide, Databricks has an extensive documentation: https://docs.databricks.com
Here you can find information on the following topics:
- Getting started with Databricks (https://docs.databricks.com/getting-started/index.html )
- Databricks Data Science & Engineering ( https://docs.databricks.com/workspace-index.html)
- Machine learning ( https://docs.databricks.com/machine-learning/index.html)
- SQL (https://docs.databricks.com/sql/index.html)