If the WeShine Google Calendar has been shared with your gmail address then you can sync to it from your personal calendar. This makes it very easy to integrate your personal Google Calendar with the shared WeShine Google Calendar.
Here are the steps
1. Open your Google Calendar and look on the left side. You should see firstname.lastname@example.org as an item on the left. If you don’t see it please check with the WeShine admins to make sure the calendar has been shared with your gmail address.
2. Click the box – and now you should see a new column on the right which is the WeShine calendar. Now you can add events to the WeShine calendar directly using this column.
For more details check these instructions from Google: https://support.google.com/calendar/answer/37100?hl=en&co=GENIE.Platform%3DDesktop