Changing the Background with Magic Wand

Changing the Background with Magic Wand - student project

I think I might be the only other person in the universe that has Pixelmator, so THANK YOU for running a class about it. I initially purchased it to create digital prints (very basic font-based items), but I recently started painting with watercolor and I've been trying to figure out how to successfully digitize my originals. Here's my first stab at using the magic wand to change the background. Thank you for teaching me how!

Changing the Background with Magic Wand - image 1 - student project

And here's my second try ...

Changing the Background with Magic Wand - image 2 - student project