Once you have successfully logged into your @nbseminary.ca account you will need to take one more step to activate the video chat (Google Hangouts) part of the account. Here is how to do that:
When you click on the +You link you will be directed to the Google+ setup page. There you will need to add your personal information and create your online profile.
Be sure to fill in your complete information and use a common name for yourself.
Here are some videos on YouTube that will help you get started: