Yeah, in a real-life situation, that's a good start.
However, for this assignment, it's going to take OP into the woods where he'll get lost and be eaten by the wolves, and you know it.
Ok, let's start there. Remember what @Idahowalker said:
So ask yourself - how could you detect current?
Hint: you'll have to do it indirectly, as an Arduino by itself doesn't measure current. It can only measure voltage.