Start a new document from one of the module buttons on the dashboard:
Fill in all information in the fields of the document, at least all fields that are required with a Red star as image below shows.
The you press on the done button on top right corner as a checkmark
Then you choose who you want to send the document to for approval.
If you are selection yourself you see a green approve button as image over,
If you select someone else to approve it you will see a green send button instead of approve.