Create an account if you don't have one, then go to the Google My Maps website (https://www.google.com/maps/d). Click on "Add a new map" in the top right corner of the page.
To create your own map, click on the "+" button and choose "Create an empty map". You will then be presented with a blank map.
You can add locations to your map by clicking on the "+" button and selecting "Add a location" or by dragging and dropping markers onto the map.
You can share your map with others by clicking on the three dots next to each marker and selecting "Share". You can also add a link or attachment to share the map.
https://www.google.com/maps/d/viewer?mid=1qEAdA3rqfA-vS246eXE9--UJYSB7xxxk