""I own Hexagon, and Carrara... What would be the next step...""

Import the model into Hexagon and Carrara and begin designing the clothing.  In Hexagon if you go up to Help>Tutorials, there is one that explains this step.  Named something to the effect of  "Create clothing for poser figures".

I imagine it might be 6mo to 1 year at least before  you're "creating great clothes" - the learning curve appears steep.

I am:  aka Velocity3d