Because you do not need to log in, you will be called "Anonymous [Random Word]". You can ignore this.
All of your available Action Steps are listed here. If this is your first visit, only Modality will be available.
Click«to close the side navigation bar.
When you revisit this page, you will see two options. Select Open your recent workflow to keep all of your previous work. (You will need to scroll down to see this.)