You're off to a good start, loosen up, and try to get the big form instead of the details. Have fun! It looks like drawing those heads hurt you.
[img]http://sketchbookfood.tumblr.com/image/97800825598[/img]
ummm I'm experiencing technical difficulties here - the pic is yonder:
http://sketchbookfood.tumblr.com/image/97800825598