Believe it or not, you can grow potatoes directly from another potatoes.
I found this article here that's really great:
https://www.rodalesorganiclife.com/garden/7-ways-grow-potatoes/slide/3
I have heard that some potatoes won't work. Probably the GMO kind, I know they are trying to prevent people from growing their own food, so perhaps try this with a local grown organic potato you get from a local farmer.