Find the next obvious next curve point the fewer anchors you add, the smoother your curves will be, but you want enough to be able to vary the shape of the curve. Click and drag slightly. When you let go with the mouse, it won't look very good it won't follow the contour of your sketch. BUT if you hold Ctrl and click on the top handle, you can stretch it to fit the curve to the sketch (as shown).(pic 4)Continue around the leg, following the sketched contours. Keep clicking & dragging slightly to make handles and then Ctrl while clicking the handle to manipulate the curve. (pic 5)If you accidentally forget to drag while making a new anchor point, it will not have handles. Just go one step backward in your history pallet (or click Ctrl+Z undo) and try again. Occasionally you'll lose the continuity of the path if you try to make a new anchor and it doesn't connect, just undo it, then carefully click on the last anchor point you made (the anchor itself, not the handles) and carry on.