Check out Druid University for some basic concepts! Imply also has a new Druid Forum where we are collecting all the best tips and tricks from our experiences with Druid and hope to have the rest of the Community join us as well.
There is a ASF run Slack channel as well.
Please let us know if you need anything!
Hi Nadeem -
I second what Peter and Rachel said. If that’s not enough for you, you just missed an email shortly before you joined where someone posted some self-learning stuff they put in github. Search messages for apache_druid_self_learn, or go to https://github.com/lnchariadoni/apache_druid_self_learn if you want to check that out, too.