Create a custom map in Google My Maps by going to the My Maps website (here) and selecting "Create new map" from the drop-down menu. Choose your map type, enter any additional details, and click on the "Get map" button.
Once you've created your custom map, you can customize it by adding markers, shapes, labels, and more. You can also add layers, including images, videos, and web pages, to enhance the functionality of your map.
To share your custom map with others, click on the "Share" button in the top right corner. Select a sharing option, such as sending via email or saving to Google Drive, and choose who has access to the map.
https://www.google.com/maps/d/viewer?mid=1strsx6JktpbwZW-6NgIf9Mmu3yIsOETj