Sharing only certain types of events on your calendar is easy!
FROM THE WEB APP
Step 1: Go to your Calendar > Calendar Sharing Icon.
Step 2: Find your ICS link and Click "Event Types".
Step 3: Select the types of events you want to display.
Step 4: Done.
FROM THE MOBILE APP
Step 1: Tap on Menu > Calendar > Calendar Sharing Icon
Step 2: Tap on the name of the user you want to edit.
Step 3: Disable the appointment types you don't want to share.
Step 4: Save / Close.