Tutorials for EasyRoads 3D

I am looking for tutorials on EasyRoads 3D.
I saw the following road design in the asset store.

I am interested in making a road design like this, but I couldn’t find any other asset or tutorial.
If there is a good tutorial, i would like to purchase this asset.

EasyRoads has a bit of a learning curve, but their demo project and documentation provide a headstart in figuring things out.

I assume you’ve already come across this video?

Yes, I did.
But, I couldn’t find anything where we can develop such cute perfect curves or straight roads.
Can you please help?