So Fusion 360 is primarily focused around CAD done with measurement specific dimensions, designed for use cases such as running through a CNC mill. With that said, Fusion 360 does offer a sculpting work space for more organic modeling methods. You create forms, and can manipulate vertices/edges that will automatically apply smooth curves on the faces. I took this for a spin and tried to sculpt the form of a simple mouse. The symmetry is lacking here but overall good practice for me.