You have not mentioned what device or browser you are using, @Felicity23, so I will assume a laptop/tablet and Chrome.
Step by step it is: Host -> Listings -> Manage listing -> scroll down to Listing Status. Click the Edit button. There you will see Listed with a green dot beside it. Click on that dropdown. Choose Unlisted.
If you want to go all the way with this, instead of clicking on the dropdown, click on Deactivate Listing. That is more permanent.