Creating a Model
Models are needed to hold cubes and dimensions pertaining to a business model of a business function such as performance management, value driver modelling, waterfall analysis, or inventory management.
You can create a new model by navigating to https://go.modlr.co/model/create/.
Before building out Dimensions and Cubes, see Architecting a Model for a short design discipline that catches structural problems while they're still cheap to fix.