If you want to create a survey based on an existing project, you can copy the survey in a very simple way.
1. Start creating the survey as you have done it so far --> New project
2. Then select "Make a copy"
3. In the next step, we choose the type of project (Survey, Test, Widget or a shared project). If we see the title of the survey which we want to copy, we choose the "Copy" button
4. Done :) The new survey can be found in the Projects tab