Really? Please, read!
Open the link i provided, look on the left, and you will see categories like:
"How to start your Escoria project"
"Create your first scene"
And "Escoria Fundamentals" which includes "The items" "Main Scene" "Inventory"
Or i'm missing something really obvious or you didn't even mind to click on the link.
There's everything in there from the setup of the scene to item structure.
Don't hope to find a step-by-step complete tutorial.
And btw, this link was provided to me by googling around 5 seconds on " how to make escoria", so....