You should be able to manage a rreading on your own, but your posture won't be rright, due to all the angles you'll have to create to do it.
Assuming you're right handed, use the cuff on your left arm, and use your right hand to find your pulse in the crook of your elbow. Pump the bulb with your left hand, until the pulse stops (note the number), then your leeft had rreleases the valve on the bulb with you listening for the pulse in your arm restarting. The stopping and starting of your pulse are your two readings.
Using your left hand will likely impact your readings, and maybe quite a bit, but you'll have fun.