Well, you can...but I wouldn't do that starting off. At least not until you're more comfortable on it.

Most of the time, you gotta keep it going with one of your feet- like this!

[To demonstrate, Jimmy drops the skateboard down and puts one foot on it, pushing off the ground with his other a couple times before standing back up on it with both feet, making sure to stay within the sight of the Gear Torch is holding.]

Like how you gotta keep pushing the pedals on a bike, 'cept with one foot instead of two