I have never heard of a "Domestic" brand of sewing machine, but I wouldn't pass it up ... surely, you can find out something about it online.
As you look at the singer from the side the operator sits at, the lever in the middle under the machine is the one you hit with your knee to lift the feed dogs.
You push forward on the foot pedal/platform to make it sew, and tap the back end to cut the threads ...
A mechanic will get it going for you ....