IntelliJ is really awesome

great presentation by Trisha Gee:





You can learn how to make the best of the IDE from this 1 hour video (if you can stand the speaker)



more tips available here:



but of course the official help https://www.jetbrains.com/help/idea/meet-intellij-idea.html contains all that info

and the product blog of course https://blog.jetbrains.com/idea/

Also, after you read this https://dzone.com/articles/why-idea-better-eclipse you definitely want to ditch Eclipse forever.

Very useful the https://resources.jetbrains.com/storage/products/intellij-idea/docs/IntelliJIDEA_ReferenceCard.pdf keymap reference (menu Help/Keymap...)

and this list of features and shortcuts:
https://www.jetbrains.com/help/idea/2018.3/discover-intellij-idea.html