Close the jump ring. You will build a chain of dangles in this way until you like the look and the length. Continue until you've attached all your dangles. Repeat with the other earring (in bead order if possible).
Pro Tip: It helps to work upside down, but hold your earrings right-side-up once in a while to see how they look. Remember to make sure your dangles fall to each side of the jump ring when you pick up the cluster.