Reddit reviews The Photographers Eye: A graphic Guide: Instantly Understand Composition & Design for Better Photography

Usually we recommend the 35 1.8G instead of the 50; it's a lot easier to work with on that kind of camera. It's an awesome lens and will work quite a lot better in low light than the ones you guys have right now.

That said, it's more than possible to get excellent pictures with the kit you already have. There's a pretty big learning curve with photography - well, at least, if you want to get properly good at it. I recommend starting with this, reading your camera's user manual carefully, then grabbing this book. And of course, practice, practice, practice.