Set up the wood you'll be cutting so that it's sturdy. It shouldn't be shifting around or leaning when you push on it. It needs to be solid.
Put on your protective gloves and eye goggles. You want to make sure that you're as protected as possible when you're using your Wen electric chainsaw.
Grip the hand bar behind the screen in your non-dominant hand. Grab the grip of the chainsaw (it should feel almost like a gun) in your dominant hand. Your index finger should be resting on the trigger. Press the trigger lock to free the trigger, and then squeeze the trigger to start the saw. Once the saw is running, press the blade against the wood you want to cut until you've sawed through it.