Hi @twillard and welcome to SimScale! 
Very happy you found your way to us 
The SimScale platform is indeed able to simulate flow through porous media also including Darcy-Forchheimer coefficients as mentioned in the documentation: Porous Media
Hint: Setting the Forchheimer coefficients f to zero will give you the Darcy equation.
Concerning the CAD preperation, you may have a look at the explanation of @dheiny in this post: Geometry for porous region
Also have a look at that interesting discussion about the setup of this kind of simulation: Setting Up a Simulation Using Porous Media
Was that what you were looking for?
Looking forward helping you with your first simulation!
Happy simulating!
Jousef