also create lore for your character that's really important, but this isn't a tutorial on writing back story.
Im using AutoDesk Sketchbook pro 2011 and an old wacom bamboo tablet.
Step 1: Setting Up
Step 2: The Blob
I decided to go with the more bunny shape and add a more pointed ear and claw like hands as you can see in the second photo.
Also before moving on to the next step save and create a duplicate of your silhouette layer in case you make a mistake or want to do a different design.