I have the same requirement. I get the following message when I try it...
You do not have the required privileges to create a workspace in this Location.
Have you found a resolution?
You need to be a group owner or should have workspace creator role to create a new workspace in Beehive Online. In this case you need to get the workspace creator role from the co-ordinator of your existing workspace or you can create a new group which will have a default workspace.