This is a collection of some of the best Looker resources.
Google-certified Senior Looker Developer with 9+ years experience
This is a collection of some of the best Looker resources.
Looker's own training website - Looker Connect - has videos and tutorials to help you with your journey as either a data consumer, a LookML developer, or a Looker administrator.
Looker's technical documentation. What's "sql_always_where:"? "publish_as_db_view:"? What's a manifest file? How should I organize my projects? Almost every detail you will ever need is somewhere in this massive archive of documentation. Written and maintained directly by Looker. Available publicly.
Go straight to the source! Always read the docs. An old programming adage is "RTFM" and doing so can only ever make you a better developer.