Welcome to knitting and KH! You've made a terrific start. You have the basics necessary for so many things, even some sweaters. There are purses, scarves, iPad covers dishcloths and towels that are simple rectangles and great practice pieces too. If you learn increasing and decreasing, there are lots of sweater patterns for you. (You can see several ways to increase and decrease on the Free Videos tab at the top of the page.)
Here are two sites with simple patterns for example:
http://www.lionbrand.com/content-kni...ternIndex.html
http://knittingpureandsimple.com/products-page/