Adobe Illustrator first tutorial - Marilyn Munroe

So, I have just had my first tutorial on Adobe Illustrator and have actually enjoyed it very much, even though I'm a Photoshop user. Our tutor (Steven) told us that for graphic designers it's the holy grail of softwares (so I need to get practicing!). I quite like that Illustrator uses vectors instead of pixels (which Photoshop uses), so this means that when I blow up an image it won't pixelate. In our first lesson on Illustrator I learnt how to use the pen tool and various other basic things regarding colour and layers. Our group had to create a pop art style picture of Marilyn Monroe befits starting out with a real picture of her. Below is the finished result.