To start sketching Ichigo Kurosaki, draw first the guidelines. Draw the circle for the head, the facial guidelines, the torso and the bell-shaped skirt. The second step is to add details to the lower part of the outfit and the face. Add now details for the hair, eye lines and the sword. Shape out the arms, and sketch the right side of the bone and the shape of the eyes. The final step would be detailing the chest, belt and the clothes of Kurosaki. You can also check out http://www.dragoart.com/tuts/1805/1/1/how-to-draw-hollow-ichigo-or-ichigo-kurosaki-from-bleach.htm if you are not sure how to proceed.