Have you thought about trying doubleknitting? It is very simple to learn and will help you to get used to working with two colors (managing two different color yarns simultaneously) and there are some simple patterns you could start out with.
Some Doubleknit Patterns
Falling Flowers Scarf
Helpful doubleknit instruction videos:
Double-knitting: Casting On
Double-knitting: Working a Charted Design
Double-knitting: Fixing Mistakes and Binding Off