We recommend installing the latest version of Unity 2019 via the Unity Hub; 2019.3 is the minimum.
In case you're new to Shotgun, check out its features page and Help Center as a starting point.
The Integrations User Guide is also a great source for additional information on workflows and apps.
Please be aware that the use of this package requires a Shotgun account and acceptance of Autodesk's terms and conditions.
We encourage you to read to the Autodesk Privacy Statement.