After installation, run the JoyServices.app program; by default it is in /Local/Applications.  Run the program; you will see an alert saying "The Joy Services Server is not installed for this user account". Click the option "Install & Run". Then, Joy Services will be present every time you log in.

Every user who wishes to take advantage of Joy Services must do this. Options to turn the services off are also contained within the software.

A good way to get started writing your own services is to look at those already provided. Alternatively select Help from the menu and look at the documentation.

The software itself is written in Joy. This shows the power of the Joy development environment.