You should go to this getting started guide for instructions on installing HappyBrackets.
The HappyBrackets YouTube Channel has plenty of videos that show what others are doing with HappyBrackets and could give you ideas for what you might be able to do, as well as tutorials.
HappyBrackets Developer Kit (Contains the HappyBrackets IntelliJ plugin, an IntelliJ project full of examples, and a mirror of the runtime system).
HappyBrackets Disk Image for the Raspberry Pi (2Gb image, compressed to approx 900Mb).
HappyBrackets Disk Image for the Raspberry Pi configured for HifiBerry or the combined HappyBrackets PiHat (2Gb image, compressed to approx 900Mb).
GrovePi.zip Prebuilt JAR files for use in HappyBrackets. Note that you should have at least 220.127.116.11 installed in the HappyBrackets developer Kit and on your device. The following video will show you how to use it: https://youtu.be/O5w_90oDzVs.
Kadenze-tutorial-files.zip Tutorial files for Kadenze course. A video showing how to install the Kadenze course files can be viewed on YouTube.
HappyBrackets Device Runtime (used by the installer scrpit).