On the right-side of "My Documents", click on "Add Project".
Hovering over the project brings up the pencil icon. Click on it to rename your project.
By clicking on "Add Document", you can:
Create a new document
Import existing files from your local disk
Import from Google Drive of the account you logged in with Typed
By clicking "Add Document" → "Create New", a small window will pop up where you can select the the document type and which project it should belong in.
Once you click "Create", you will be automatically redirected to the workspace of the document.
You can move documents to other projects by simple holding on the six dots that appear when hovering and dragging and dropping into the preferred project folder.