Hello,

For this, you have created the view for the shop,

Inventory>Configuration>Locations

Click NEW to create a new View under which the stock is managed.
Here, WH is the View of my Warehouse. 

I selected the WH View as the parent view for the Shop View. Under that Shop, you can create your location with Location Type as Internal Location

After this Added a quantity in Product template

Inventory>Products>Products

To Update the Quantity Hover near Quantity On Hand,

In SALES APP, 

After confirming the order, go to the delivery smart button, and change the Source Location to WH

Click the Add Line,

Finally we got

Check and clarify your doubts