Here are some simple instructions on how to create your own group.
1. Once registered and logged in, click on 'Groups' in the menu shown below.

2. Then click on 'Create' at the right of the menu, as shown below.

3. Finally, name your group, give it a description and choose wether you want it to be a private or public group (see below) and off you go!

You can now invite your friends to join your group.
Create a Group