Already completed this assignment using graphite pencils since I want to get more comfortable with traditional media, but it can't hurt to do extra work digitally as well :)

Not quite exact. But, I like it.

When you have enough of experiences then only you can forward the drawing skill/knowledge to others. As you have took the challenge without preparation, get familiar with basic sculpture designing first then use your imagination to create something. Then only it will be true form of art. Best of Luck.!