The Hull Assistants are intended to speed the process of creating a 3D surface that you can modify to create your final hull shape. It's very unlikely that they will automatically create your final hull form, but they can get you close very quickly. Once the 3D surface is created, you can modify it using the Orca3D control points, watching the sections and hydrostatics updating in real-time as you go.
For complete information on the Hull Assistants, please see the Hull Assistants topic in the Quick Start Tutorial section.