From your 'My Hub' page (please see below)
If you go to the 'Menu' icon in the top right...
then select 'Groups' from the options
This will then show any groups you have already created
By clicking the 'Event' tab from the 5 options at the top of your page
You will be able to create an Event group by selecting 'Create Event Group' at the bottom of your page.
Add the group name
And then simply select the group to add any Events through the 'Manage Events' button.