I uploaded my storyboard to dA, but forgot to post it till now: http://yazzob.deviantart.com/art/BBB-MLP-FiM-Test-Storyboard-WTH-is-a-Ladle-319292486
I'm certainly no pro or expert, but I would be happy to give you a view tips and pointers if you want em, or even better, point you towards some people and resources who know a lot more than me! Also, it most certainly is not essential for you to create a full colored comic to be a good board artist, though of course that would be good practice for whatever art you do. It's much more important to be able to tell a good story with a storyboard than to be the most incredibly amazing artist and obsess over every panel. One thing you don't want to do in boarding is fall in love with your art, as so much of it will get changed or cut!