To create your own analysis, you have to go back to your Homescreen.
Open the project to create an analysis document in this project.
Provided that you have sufficient rights to create new analysis objects, a blue "Create New" button will appear in your toolbar. Click this button to open a drop-down menu:
Please Note
Enterprise-Server Edition:
You might have granted sufficient rights to create a new analysis document, but might not be allowed to create a new data model.
For this reason, the content of this drop-down menu might display less entries.