Knitting Is A-knoyying

Augghgghh!!! Caitlin wants to learn how to knit and I said I would teach her. My grandmother taught me when I was young but I forgot how and she's dead so she isn't too much help at this point. I tried to watch a YouTube video and read articles on the internet, but something isn't going right. I can cast on but when I try to do the second row it gets all screwed up. How hard can it be to knit??? I feel like an idiot. Help!!!!!