This is your Account Dashboard, it's the first thing you see when you log into Lumi.
This will display any Projects you have access to.
Simply clicking them will open up the Project.
There might be just one, or several depending on what your organisation is working on and if they have given you access to all or just one or two of those projects.
If you can't see a Project here you likely don't have access to it and will need to ask an administrator to add you.
Clicking on any of the projects take you to that project's Dashboard.
You can return to this Account Dashboard at any time by pressing this button on the top left 
You can also quickly jump to various Projects via the Home Button inside Projects. 
Please note, only Account Admins can create a new Project, to find out how to create a new Project click here