I would like to create the shortest route starting from one specific point in a network out of 12 different points. I know how to get the shortest route by clicking each point after the other to give arcgis the order. but what i wanna do is to just give the starting point and let arcgis calculate the best/shortest route out of all these points.
You should use the Reorder Stops To Find Optimal Route option.
Create a Route network layer > open Layer Properties window.