I’ll just echo what Adrian and Martin have said, it’s all about practicing a lot and it’s worth the time investment, sculpting is really cool, specially if you have a illustration background. I’d say it helps a lot to draw in pen and paper, those skills translate to 3D. As you practice sculpting, you start to get the feel of brushes and how the digital clay behaves, that’s all there is to it, after that it’s all about your eye, drawing, shaping, molding, so practice, practice, practice.
