Story Maps are a great way to combine your maps with narrative text, images, and multimedia content to create compelling, user-friendly artefact. There are various formats you can use to create a map. a tour, a narrative suited to your content. The gallery contains some great geographical examples. My current favourites are A World of Forests and A World of Forests Atlas; Stormwater A-Go-Go, and Age of Humans: The Living Land.
Check out the Gallery https://storymaps.arcgis.com/en/gallery/#s=120
Create an ArcGIS account https://www.arcgis.com/home/createaccount.html
Choose your template and get started https://storymaps.arcgis.com/en/app-list/