Click the blue button. Now you can create the flow. There is a message about the content which cannot be changed from now on. Which is perfect.
Now click the button that will give you the link. Head to flows, and paste the number and save.
That's it.
Post Scriptum
Wiseflow is far from intuitive in practise. I had to click each and every button in order to find out how to "publish". I developed this method for solving weird interfaces in computergames in the mid 1980s. Now don't say that we waste time on computergames!