AstroNikon - I was thinking that as well. Been playing with it a lot more with different shutter speeds. Thanks!
Start learning more about aperture and shutter as they affect how you want to capture an image.
For instance the main things to think about before taking a photo is
a - what shutter speed is best for the situation (something not moving, person moving, large scene which could have movement vs no movement).
b - what aperture do I want for the object (shallow DOF for isolating the subject vs get detail of the entire scene)
let ISO be automatic to compensate for your selections if you want.
There's so much to learn
Such as, go to a busy street corner with a lot of moving foot/car traffic.
use a small aperture (and or ND filter or in the evening), and a long exposure (say 30 seconds or longer ). You'll notice that with the moving people that they may be ghosts in the shot or not in it at all. And all you have left over is an empty street corner. It's quite a good learning experience.
When I first got my 50mm lens it allowed me to learn alot. Things that weren't obvious suing other lenses became obvious with that (ie, like f/1.8 - f/22 DOF - the f/4.5- f/16 wasn't very obvious to me at that time). then learning more about shutter speed with aperture became more obvious as I could do more extremes).
So as mentioned above, keep the 50 on and use it all the time and learn how to use all the f/stops and how they vary, just try a shot at all different settings. You'll learn alot.