Macaroni and cheese is the best food ever. The trouble is, you can't microwave it. Or you can, but it comes out with the consistency of library paste. So you have to cook it. To do so, you have to boil water.
Boiling water is pretty easy, but it does involve actually turning the stove on.
You will have to find the knob that makes one of the burners get hot. Try turning all of them and see what happens. If it is a gas stove that has real flame, do not lean too close when you do this, or at least make sure your health insurance is paid up. After you get all the burners on, see if you can turn all but one of them off. This is complicated, delicate stuff, and I wouldn't recommend messing with the stove at all if macaroni and cheese weren't the staple that it is.