It would be good if we can display a custom notice box on question and Ask page for new visitors. If this could be implemented in core then that's good but a plugin will also do the job.
As new visitors don't know much about the sites so it will be good to show them such a notice box so that they can be directed in the right way. This notice can be displayed to them for the first two times.
Here is an image, how this may look.