Hi Carly,
Once you have inserted an image onto the landing page, you should see an area with a downward pointing arrow. It will be right beneath where it says auto-saved and the date. Click that downward pointing arrow, and a drop down should appear. There will be an area that says linkUrl. You can input the URL you want the image to link to in this area. Once the page has saved, you can approve it, and the image will now link to that URL.