Welcome to Databricks community.

You should head to https://www.databricks.com/learn and practice them here on the Free edition https://www.databricks.com/learn/free-edition 

Start with the free, short fundamentals courses to build a strong base: take Databricks Fundamentals and then Lakehouse Fundamentals to earn shareable badges. These are designed for absolute beginners. 

Databricks Training & Certification programs (catalog, badges, ILT):  https://www.databricks.com/learn/training/home

Our documentations are great! Checkout getting started guides - https://community.databricks.com/t5/get-started-resources/ct-p/GetStartedResources

If you are looking for something specific, please do let me know and I can guide further.

Thanks!