Welcome to the wonderful world of knitting!
Usually I leave my end hanging for a while, especially if say I was working on a striped scarf, so I knew when to change colors (you'll get into that later). My first scarf I attempted stripes, but was clueless about the right side and wrong side, so the stripes are uneven. My boyfriend says he loves it and would wear it all the timeif it was cold where we live!
So if you're just doing a solid color, you can use an embroidery needle and weave it into whatever you're working on