I’m pretty sure they include a lancet in the kit, which is what diabetics prick their finger with. It’s much less painful than a bee sting or a shot, honest. I would ask the pharmacist to walk me through it, he/she can actually open it and go over the instructions with you. It should be pretty easy. If you still have questions after you read the instructions, call the pharmacist and talk to them again.
p.s. when I looked them up online, there were variations in prices at Walmart ranging from $10 to $21, so you might get it cheaper than $16.