Digital sculpting is a more intuitive technique than modeling with polygons, subdivisions and hypernurbs. It can be compared to taking a lump of clay and shaping and refining it until you get the shape you want.
Sculpting, like all forms of modeling, takes a bit of time to get used to but it is a lot of fun once you get going. It also really helps to use a graphics tablet.
Sculpting relies on using a very fine mesh (that is, lots and lots of polygons), once we have sculpted our object we can then bake it to a lower density mesh using shaders so we can have a very light and flexible object with lots of detail when rendering.
In this recipe we're just going to have a play around with some of the sculpting tools and get a feel for the workflow. It's a little different to other modes of modeling so it's worth getting familiar with.
Just create a normal sphere (from the Object menu) and then press C to make it editable. Now, go to Layout and select Sculpting...